2798680

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{61}}^1$

素因数の和:140

約数の個数: 64

約数和(自身を含む): 6785280

約数和(自身を除く): 3986600

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 37, 40, 61, 62, 74, 122, 124, 148, 155, 185, 244, 248, 296, 305, 310, 370, 488, 610, 620, 740, 1147, 1220, 1240, 1480, 1891, 2257, 2294, 2440, 3782, 4514, 4588, 5735, 7564, 9028, 9176, 9455, 11285, 11470, 15128, 18056, 18910, 22570, 22940, 37820, 45140, 45880, 69967, 75640, 90280, 139934, 279868, 349835, 559736, 699670, 1399340, 2798680]

約数ペア:

[(1, 2798680), (2, 1399340), (4, 699670), (5, 559736), (8, 349835), (10, 279868), (20, 139934), (31, 90280), (37, 75640), (40, 69967), (61, 45880), (62, 45140), (74, 37820), (122, 22940), (124, 22570), (148, 18910), (155, 18056), (185, 15128), (244, 11470), (248, 11285), (296, 9455), (305, 9176), (310, 9028), (370, 7564), (488, 5735), (610, 4588), (620, 4514), (740, 3782), (1147, 2440), (1220, 2294), (1240, 2257), (1480, 1891)]