20689680

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{461}}^1$

素因数の和:505

約数の個数: 160

約数和(自身を含む): 74245248

約数和(自身を除く): 53555568

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 11, 12, 15, 16, 17, 20, 22, 24, 30, 33, 34, 40, 44, 48, 51, 55, 60, 66, 68, 80, 85, 88, 102, 110, 120, 132, 136, 165, 170, 176, 187, 204, 220, 240, 255, 264, 272, 330, 340, 374, 408, 440, 461, 510, 528, 561, 660, 680, 748, 816, 880, 922, 935, 1020, 1122, 1320, 1360, 1383, 1496, 1844, 1870, 2040, 2244, 2305, 2640, 2766, 2805, 2992, 3688, 3740, 4080, 4488, 4610, 5071, 5532, 5610, 6915, 7376, 7480, 7837, 8976, 9220, 10142, 11064, 11220, 13830, 14960, 15213, 15674, 18440, 20284, 22128, 22440, 23511, 25355, 27660, 30426, 31348, 36880, 39185, 40568, 44880, 47022, 50710, 55320, 60852, 62696, 76065, 78370, 81136, 86207, 94044, 101420, 110640, 117555, 121704, 125392, 152130, 156740, 172414, 188088, 202840, 235110, 243408, 258621, 304260, 313480, 344828, 376176, 405680, 431035, 470220, 517242, 608520, 626960, 689656, 862070, 940440, 1034484, 1217040, 1293105, 1379312, 1724140, 1880880, 2068968, 2586210, 3448280, 4137936, 5172420, 6896560, 10344840, 20689680]

約数ペア:

[(1, 20689680), (2, 10344840), (3, 6896560), (4, 5172420), (5, 4137936), (6, 3448280), (8, 2586210), (10, 2068968), (11, 1880880), (12, 1724140), (15, 1379312), (16, 1293105), (17, 1217040), (20, 1034484), (22, 940440), (24, 862070), (30, 689656), (33, 626960), (34, 608520), (40, 517242), (44, 470220), (48, 431035), (51, 405680), (55, 376176), (60, 344828), (66, 313480), (68, 304260), (80, 258621), (85, 243408), (88, 235110), (102, 202840), (110, 188088), (120, 172414), (132, 156740), (136, 152130), (165, 125392), (170, 121704), (176, 117555), (187, 110640), (204, 101420), (220, 94044), (240, 86207), (255, 81136), (264, 78370), (272, 76065), (330, 62696), (340, 60852), (374, 55320), (408, 50710), (440, 47022), (461, 44880), (510, 40568), (528, 39185), (561, 36880), (660, 31348), (680, 30426), (748, 27660), (816, 25355), (880, 23511), (922, 22440), (935, 22128), (1020, 20284), (1122, 18440), (1320, 15674), (1360, 15213), (1383, 14960), (1496, 13830), (1844, 11220), (1870, 11064), (2040, 10142), (2244, 9220), (2305, 8976), (2640, 7837), (2766, 7480), (2805, 7376), (2992, 6915), (3688, 5610), (3740, 5532), (4080, 5071), (4488, 4610)]