813440

素因数分解:

$2^7\times 5^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1$

素因数の和:91

約数の個数: 64

約数和(自身を含む): 2056320

約数和(自身を除く): 1242880

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 41, 62, 64, 80, 82, 124, 128, 155, 160, 164, 205, 248, 310, 320, 328, 410, 496, 620, 640, 656, 820, 992, 1240, 1271, 1312, 1640, 1984, 2480, 2542, 2624, 3280, 3968, 4960, 5084, 5248, 6355, 6560, 9920, 10168, 12710, 13120, 19840, 20336, 25420, 26240, 40672, 50840, 81344, 101680, 162688, 203360, 406720, 813440]

約数ペア:

[(1, 813440), (2, 406720), (4, 203360), (5, 162688), (8, 101680), (10, 81344), (16, 50840), (20, 40672), (31, 26240), (32, 25420), (40, 20336), (41, 19840), (62, 13120), (64, 12710), (80, 10168), (82, 9920), (124, 6560), (128, 6355), (155, 5248), (160, 5084), (164, 4960), (205, 3968), (248, 3280), (310, 2624), (320, 2542), (328, 2480), (410, 1984), (496, 1640), (620, 1312), (640, 1271), (656, 1240), (820, 992)]