21000251970

素因数分解:

$2^1\times 3^8\times 5^1\times {\mathrm{331}}^1\times {\mathrm{967}}^1$

素因数の和:1329

約数の個数: 144

約数和(自身を含む): 56927901888

約数和(自身を除く): 35927649918

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 27, 30, 45, 54, 81, 90, 135, 162, 243, 270, 331, 405, 486, 662, 729, 810, 967, 993, 1215, 1458, 1655, 1934, 1986, 2187, 2430, 2901, 2979, 3310, 3645, 4374, 4835, 4965, 5802, 5958, 6561, 7290, 8703, 8937, 9670, 9930, 10935, 13122, 14505, 14895, 17406, 17874, 21870, 26109, 26811, 29010, 29790, 32805, 43515, 44685, 52218, 53622, 65610, 78327, 80433, 87030, 89370, 130545, 134055, 156654, 160866, 234981, 241299, 261090, 268110, 320077, 391635, 402165, 469962, 482598, 640154, 704943, 723897, 783270, 804330, 960231, 1174905, 1206495, 1409886, 1447794, 1600385, 1920462, 2114829, 2171691, 2349810, 2412990, 2880693, 3200770, 3524715, 3619485, 4229658, 4343382, 4801155, 5761386, 6344487, 7049430, 7238970, 8642079, 9602310, 10574145, 10858455, 12688974, 14403465, 17284158, 21148290, 21716910, 25926237, 28806930, 31722435, 43210395, 51852474, 63444870, 77778711, 86420790, 129631185, 155557422, 233336133, 259262370, 388893555, 466672266, 700008399, 777787110, 1166680665, 1400016798, 2100025197, 2333361330, 3500041995, 4200050394, 7000083990, 10500125985, 21000251970]

約数ペア:

[(1, 21000251970), (2, 10500125985), (3, 7000083990), (5, 4200050394), (6, 3500041995), (9, 2333361330), (10, 2100025197), (15, 1400016798), (18, 1166680665), (27, 777787110), (30, 700008399), (45, 466672266), (54, 388893555), (81, 259262370), (90, 233336133), (135, 155557422), (162, 129631185), (243, 86420790), (270, 77778711), (331, 63444870), (405, 51852474), (486, 43210395), (662, 31722435), (729, 28806930), (810, 25926237), (967, 21716910), (993, 21148290), (1215, 17284158), (1458, 14403465), (1655, 12688974), (1934, 10858455), (1986, 10574145), (2187, 9602310), (2430, 8642079), (2901, 7238970), (2979, 7049430), (3310, 6344487), (3645, 5761386), (4374, 4801155), (4835, 4343382), (4965, 4229658), (5802, 3619485), (5958, 3524715), (6561, 3200770), (7290, 2880693), (8703, 2412990), (8937, 2349810), (9670, 2171691), (9930, 2114829), (10935, 1920462), (13122, 1600385), (14505, 1447794), (14895, 1409886), (17406, 1206495), (17874, 1174905), (21870, 960231), (26109, 804330), (26811, 783270), (29010, 723897), (29790, 704943), (32805, 640154), (43515, 482598), (44685, 469962), (52218, 402165), (53622, 391635), (65610, 320077), (78327, 268110), (80433, 261090), (87030, 241299), (89370, 234981), (130545, 160866), (134055, 156654)]