19720680

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{1381}}^1$

素因数の和:1419

約数の個数: 128

約数和(自身を含む): 71642880

約数和(自身を除く): 51922200

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 17, 20, 21, 24, 28, 30, 34, 35, 40, 42, 51, 56, 60, 68, 70, 84, 85, 102, 105, 119, 120, 136, 140, 168, 170, 204, 210, 238, 255, 280, 340, 357, 408, 420, 476, 510, 595, 680, 714, 840, 952, 1020, 1190, 1381, 1428, 1785, 2040, 2380, 2762, 2856, 3570, 4143, 4760, 5524, 6905, 7140, 8286, 9667, 11048, 13810, 14280, 16572, 19334, 20715, 23477, 27620, 29001, 33144, 38668, 41430, 46954, 48335, 55240, 58002, 70431, 77336, 82860, 93908, 96670, 116004, 117385, 140862, 145005, 164339, 165720, 187816, 193340, 232008, 234770, 281724, 290010, 328678, 352155, 386680, 469540, 493017, 563448, 580020, 657356, 704310, 821695, 939080, 986034, 1160040, 1314712, 1408620, 1643390, 1972068, 2465085, 2817240, 3286780, 3944136, 4930170, 6573560, 9860340, 19720680]

約数ペア:

[(1, 19720680), (2, 9860340), (3, 6573560), (4, 4930170), (5, 3944136), (6, 3286780), (7, 2817240), (8, 2465085), (10, 1972068), (12, 1643390), (14, 1408620), (15, 1314712), (17, 1160040), (20, 986034), (21, 939080), (24, 821695), (28, 704310), (30, 657356), (34, 580020), (35, 563448), (40, 493017), (42, 469540), (51, 386680), (56, 352155), (60, 328678), (68, 290010), (70, 281724), (84, 234770), (85, 232008), (102, 193340), (105, 187816), (119, 165720), (120, 164339), (136, 145005), (140, 140862), (168, 117385), (170, 116004), (204, 96670), (210, 93908), (238, 82860), (255, 77336), (280, 70431), (340, 58002), (357, 55240), (408, 48335), (420, 46954), (476, 41430), (510, 38668), (595, 33144), (680, 29001), (714, 27620), (840, 23477), (952, 20715), (1020, 19334), (1190, 16572), (1381, 14280), (1428, 13810), (1785, 11048), (2040, 9667), (2380, 8286), (2762, 7140), (2856, 6905), (3570, 5524), (4143, 4760)]