21000401275

素因数分解:

$5^2\times 7^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{67}}^1\times {\mathrm{1811}}^1$

素因数の和:1961

約数の個数: 96

約数和(自身を含む): 32268791808

約数和(自身を除く): 11268390533

約数列:

[1, 5, 7, 23, 25, 35, 43, 67, 115, 161, 175, 215, 301, 335, 469, 575, 805, 989, 1075, 1505, 1541, 1675, 1811, 2345, 2881, 4025, 4945, 6923, 7525, 7705, 9055, 10787, 11725, 12677, 14405, 20167, 24725, 34615, 38525, 41653, 45275, 53935, 63385, 66263, 72025, 77873, 100835, 121337, 173075, 208265, 269675, 291571, 316925, 331315, 389365, 463841, 504175, 545111, 606685, 849359, 1041325, 1457855, 1656575, 1791079, 1946825, 2319205, 2725555, 2790751, 3033425, 4246795, 5217491, 7289275, 8955395, 11596025, 12537553, 13627775, 13953755, 19535257, 21233975, 26087455, 36522437, 44776975, 62687765, 69768775, 97676285, 120002293, 130437275, 182612185, 313438825, 488381425, 600011465, 840016051, 913060925, 3000057325, 4200080255, 21000401275]

約数ペア:

[(1, 21000401275), (5, 4200080255), (7, 3000057325), (23, 913060925), (25, 840016051), (35, 600011465), (43, 488381425), (67, 313438825), (115, 182612185), (161, 130437275), (175, 120002293), (215, 97676285), (301, 69768775), (335, 62687765), (469, 44776975), (575, 36522437), (805, 26087455), (989, 21233975), (1075, 19535257), (1505, 13953755), (1541, 13627775), (1675, 12537553), (1811, 11596025), (2345, 8955395), (2881, 7289275), (4025, 5217491), (4945, 4246795), (6923, 3033425), (7525, 2790751), (7705, 2725555), (9055, 2319205), (10787, 1946825), (11725, 1791079), (12677, 1656575), (14405, 1457855), (20167, 1041325), (24725, 849359), (34615, 606685), (38525, 545111), (41653, 504175), (45275, 463841), (53935, 389365), (63385, 331315), (66263, 316925), (72025, 291571), (77873, 269675), (100835, 208265), (121337, 173075)]