128428400

素因数分解:

$2^4\times 5^2\times {\mathrm{41}}^2\times {\mathrm{191}}^1$

素因数の和:291

約数の個数: 90

約数和(自身を含む): 317914176

約数和(自身を除く): 189485776

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 41, 50, 80, 82, 100, 164, 191, 200, 205, 328, 382, 400, 410, 656, 764, 820, 955, 1025, 1528, 1640, 1681, 1910, 2050, 3056, 3280, 3362, 3820, 4100, 4775, 6724, 7640, 7831, 8200, 8405, 9550, 13448, 15280, 15662, 16400, 16810, 19100, 26896, 31324, 33620, 38200, 39155, 42025, 62648, 67240, 76400, 78310, 84050, 125296, 134480, 156620, 168100, 195775, 313240, 321071, 336200, 391550, 626480, 642142, 672400, 783100, 1284284, 1566200, 1605355, 2568568, 3132400, 3210710, 5137136, 6421420, 8026775, 12842840, 16053550, 25685680, 32107100, 64214200, 128428400]

約数ペア:

[(1, 128428400), (2, 64214200), (4, 32107100), (5, 25685680), (8, 16053550), (10, 12842840), (16, 8026775), (20, 6421420), (25, 5137136), (40, 3210710), (41, 3132400), (50, 2568568), (80, 1605355), (82, 1566200), (100, 1284284), (164, 783100), (191, 672400), (200, 642142), (205, 626480), (328, 391550), (382, 336200), (400, 321071), (410, 313240), (656, 195775), (764, 168100), (820, 156620), (955, 134480), (1025, 125296), (1528, 84050), (1640, 78310), (1681, 76400), (1910, 67240), (2050, 62648), (3056, 42025), (3280, 39155), (3362, 38200), (3820, 33620), (4100, 31324), (4775, 26896), (6724, 19100), (7640, 16810), (7831, 16400), (8200, 15662), (8405, 15280), (9550, 13448)]