1640208520

素因数分解:

$2^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{677}}^1\times {\mathrm{1637}}^1$

素因数の和:2362

約数の個数: 64

約数和(自身を含む): 3798128880

約数和(自身を除く): 2157920360

約数列:

[1, 2, 4, 5, 8, 10, 20, 37, 40, 74, 148, 185, 296, 370, 677, 740, 1354, 1480, 1637, 2708, 3274, 3385, 5416, 6548, 6770, 8185, 13096, 13540, 16370, 25049, 27080, 32740, 50098, 60569, 65480, 100196, 121138, 125245, 200392, 242276, 250490, 302845, 484552, 500980, 605690, 1001960, 1108249, 1211380, 2216498, 2422760, 4432996, 5541245, 8865992, 11082490, 22164980, 41005213, 44329960, 82010426, 164020852, 205026065, 328041704, 410052130, 820104260, 1640208520]

約数ペア:

[(1, 1640208520), (2, 820104260), (4, 410052130), (5, 328041704), (8, 205026065), (10, 164020852), (20, 82010426), (37, 44329960), (40, 41005213), (74, 22164980), (148, 11082490), (185, 8865992), (296, 5541245), (370, 4432996), (677, 2422760), (740, 2216498), (1354, 1211380), (1480, 1108249), (1637, 1001960), (2708, 605690), (3274, 500980), (3385, 484552), (5416, 302845), (6548, 250490), (6770, 242276), (8185, 200392), (13096, 125245), (13540, 121138), (16370, 100196), (25049, 65480), (27080, 60569), (32740, 50098)]