640738472

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{307}}^1\times {\mathrm{641}}^1$

素因数の和:1002

約数の個数: 64

約数和(自身を含む): 1352514240

約数和(自身を除く): 711775768

約数列:

[1, 2, 4, 8, 11, 22, 37, 44, 74, 88, 148, 296, 307, 407, 614, 641, 814, 1228, 1282, 1628, 2456, 2564, 3256, 3377, 5128, 6754, 7051, 11359, 13508, 14102, 22718, 23717, 27016, 28204, 45436, 47434, 56408, 90872, 94868, 124949, 189736, 196787, 249898, 260887, 393574, 499796, 521774, 787148, 999592, 1043548, 1574296, 2087096, 2164657, 4329314, 7281119, 8658628, 14562238, 17317256, 29124476, 58248952, 80092309, 160184618, 320369236, 640738472]

約数ペア:

[(1, 640738472), (2, 320369236), (4, 160184618), (8, 80092309), (11, 58248952), (22, 29124476), (37, 17317256), (44, 14562238), (74, 8658628), (88, 7281119), (148, 4329314), (296, 2164657), (307, 2087096), (407, 1574296), (614, 1043548), (641, 999592), (814, 787148), (1228, 521774), (1282, 499796), (1628, 393574), (2456, 260887), (2564, 249898), (3256, 196787), (3377, 189736), (5128, 124949), (6754, 94868), (7051, 90872), (11359, 56408), (13508, 47434), (14102, 45436), (22718, 28204), (23717, 27016)]