678450400

素因数分解:

$2^5\times 5^2\times {\mathrm{661}}^1\times {\mathrm{1283}}^1$

素因数の和:1964

約数の個数: 72

約数和(自身を含む): 1660065624

約数和(自身を除く): 981615224

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 160, 200, 400, 661, 800, 1283, 1322, 2566, 2644, 3305, 5132, 5288, 6415, 6610, 10264, 10576, 12830, 13220, 16525, 20528, 21152, 25660, 26440, 32075, 33050, 41056, 51320, 52880, 64150, 66100, 102640, 105760, 128300, 132200, 205280, 256600, 264400, 513200, 528800, 848063, 1026400, 1696126, 3392252, 4240315, 6784504, 8480630, 13569008, 16961260, 21201575, 27138016, 33922520, 42403150, 67845040, 84806300, 135690080, 169612600, 339225200, 678450400]

約数ペア:

[(1, 678450400), (2, 339225200), (4, 169612600), (5, 135690080), (8, 84806300), (10, 67845040), (16, 42403150), (20, 33922520), (25, 27138016), (32, 21201575), (40, 16961260), (50, 13569008), (80, 8480630), (100, 6784504), (160, 4240315), (200, 3392252), (400, 1696126), (661, 1026400), (800, 848063), (1283, 528800), (1322, 513200), (2566, 264400), (2644, 256600), (3305, 205280), (5132, 132200), (5288, 128300), (6415, 105760), (6610, 102640), (10264, 66100), (10576, 64150), (12830, 52880), (13220, 51320), (16525, 41056), (20528, 33050), (21152, 32075), (25660, 26440)]