20668440

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{13249}}^1$

素因数の和:13276

約数の個数: 64

約数和(自身を含む): 66780000

約数和(自身を除く): 46111560

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 20, 24, 26, 30, 39, 40, 52, 60, 65, 78, 104, 120, 130, 156, 195, 260, 312, 390, 520, 780, 1560, 13249, 26498, 39747, 52996, 66245, 79494, 105992, 132490, 158988, 172237, 198735, 264980, 317976, 344474, 397470, 516711, 529960, 688948, 794940, 861185, 1033422, 1377896, 1589880, 1722370, 2066844, 2583555, 3444740, 4133688, 5167110, 6889480, 10334220, 20668440]

約数ペア:

[(1, 20668440), (2, 10334220), (3, 6889480), (4, 5167110), (5, 4133688), (6, 3444740), (8, 2583555), (10, 2066844), (12, 1722370), (13, 1589880), (15, 1377896), (20, 1033422), (24, 861185), (26, 794940), (30, 688948), (39, 529960), (40, 516711), (52, 397470), (60, 344474), (65, 317976), (78, 264980), (104, 198735), (120, 172237), (130, 158988), (156, 132490), (195, 105992), (260, 79494), (312, 66245), (390, 52996), (520, 39747), (780, 26498), (1560, 13249)]