20844400

素因数分解:

$2^4\times 5^2\times {\mathrm{31}}^1\times {\mathrm{41}}^2$

素因数の和:131

約数の個数: 90

約数和(自身を含む): 52985696

約数和(自身を除く): 32141296

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 31, 40, 41, 50, 62, 80, 82, 100, 124, 155, 164, 200, 205, 248, 310, 328, 400, 410, 496, 620, 656, 775, 820, 1025, 1240, 1271, 1550, 1640, 1681, 2050, 2480, 2542, 3100, 3280, 3362, 4100, 5084, 6200, 6355, 6724, 8200, 8405, 10168, 12400, 12710, 13448, 16400, 16810, 20336, 25420, 26896, 31775, 33620, 42025, 50840, 52111, 63550, 67240, 84050, 101680, 104222, 127100, 134480, 168100, 208444, 254200, 260555, 336200, 416888, 508400, 521110, 672400, 833776, 1042220, 1302775, 2084440, 2605550, 4168880, 5211100, 10422200, 20844400]

約数ペア:

[(1, 20844400), (2, 10422200), (4, 5211100), (5, 4168880), (8, 2605550), (10, 2084440), (16, 1302775), (20, 1042220), (25, 833776), (31, 672400), (40, 521110), (41, 508400), (50, 416888), (62, 336200), (80, 260555), (82, 254200), (100, 208444), (124, 168100), (155, 134480), (164, 127100), (200, 104222), (205, 101680), (248, 84050), (310, 67240), (328, 63550), (400, 52111), (410, 50840), (496, 42025), (620, 33620), (656, 31775), (775, 26896), (820, 25420), (1025, 20336), (1240, 16810), (1271, 16400), (1550, 13448), (1640, 12710), (1681, 12400), (2050, 10168), (2480, 8405), (2542, 8200), (3100, 6724), (3280, 6355), (3362, 6200), (4100, 5084)]