21989940

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{1277}}^1$

素因数の和:1337

約数の個数: 96

約数和(自身を含む): 72140544

約数和(自身を除く): 50150604

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 41, 42, 60, 70, 82, 84, 105, 123, 140, 164, 205, 210, 246, 287, 410, 420, 492, 574, 615, 820, 861, 1148, 1230, 1277, 1435, 1722, 2460, 2554, 2870, 3444, 3831, 4305, 5108, 5740, 6385, 7662, 8610, 8939, 12770, 15324, 17220, 17878, 19155, 25540, 26817, 35756, 38310, 44695, 52357, 53634, 76620, 89390, 104714, 107268, 134085, 157071, 178780, 209428, 261785, 268170, 314142, 366499, 523570, 536340, 628284, 732998, 785355, 1047140, 1099497, 1465996, 1570710, 1832495, 2198994, 3141420, 3664990, 4397988, 5497485, 7329980, 10994970, 21989940]

約数ペア:

[(1, 21989940), (2, 10994970), (3, 7329980), (4, 5497485), (5, 4397988), (6, 3664990), (7, 3141420), (10, 2198994), (12, 1832495), (14, 1570710), (15, 1465996), (20, 1099497), (21, 1047140), (28, 785355), (30, 732998), (35, 628284), (41, 536340), (42, 523570), (60, 366499), (70, 314142), (82, 268170), (84, 261785), (105, 209428), (123, 178780), (140, 157071), (164, 134085), (205, 107268), (210, 104714), (246, 89390), (287, 76620), (410, 53634), (420, 52357), (492, 44695), (574, 38310), (615, 35756), (820, 26817), (861, 25540), (1148, 19155), (1230, 17878), (1277, 17220), (1435, 15324), (1722, 12770), (2460, 8939), (2554, 8610), (2870, 7662), (3444, 6385), (3831, 5740), (4305, 5108)]