20865750

素因数分解:

$2^1\times 3^1\times 5^3\times {\mathrm{43}}^1\times {\mathrm{647}}^1$

素因数の和:710

約数の個数: 64

約数和(自身を含む): 53374464

約数和(自身を除く): 32508714

約数列:

[1, 2, 3, 5, 6, 10, 15, 25, 30, 43, 50, 75, 86, 125, 129, 150, 215, 250, 258, 375, 430, 645, 647, 750, 1075, 1290, 1294, 1941, 2150, 3225, 3235, 3882, 5375, 6450, 6470, 9705, 10750, 16125, 16175, 19410, 27821, 32250, 32350, 48525, 55642, 80875, 83463, 97050, 139105, 161750, 166926, 242625, 278210, 417315, 485250, 695525, 834630, 1391050, 2086575, 3477625, 4173150, 6955250, 10432875, 20865750]

約数ペア:

[(1, 20865750), (2, 10432875), (3, 6955250), (5, 4173150), (6, 3477625), (10, 2086575), (15, 1391050), (25, 834630), (30, 695525), (43, 485250), (50, 417315), (75, 278210), (86, 242625), (125, 166926), (129, 161750), (150, 139105), (215, 97050), (250, 83463), (258, 80875), (375, 55642), (430, 48525), (645, 32350), (647, 32250), (750, 27821), (1075, 19410), (1290, 16175), (1294, 16125), (1941, 10750), (2150, 9705), (3225, 6470), (3235, 6450), (3882, 5375)]