21271380

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{27271}}^1$

素因数の和:27296

約数の個数: 48

約数和(自身を含む): 64143744

約数和(自身を除く): 42872364

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, 780, 27271, 54542, 81813, 109084, 136355, 163626, 272710, 327252, 354523, 409065, 545420, 709046, 818130, 1063569, 1418092, 1636260, 1772615, 2127138, 3545230, 4254276, 5317845, 7090460, 10635690, 21271380]

約数ペア:

[(1, 21271380), (2, 10635690), (3, 7090460), (4, 5317845), (5, 4254276), (6, 3545230), (10, 2127138), (12, 1772615), (13, 1636260), (15, 1418092), (20, 1063569), (26, 818130), (30, 709046), (39, 545420), (52, 409065), (60, 354523), (65, 327252), (78, 272710), (130, 163626), (156, 136355), (195, 109084), (260, 81813), (390, 54542), (780, 27271)]