20909560

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{1409}}^1$

素因数の和:1480

約数の個数: 64

約数和(自身を含む): 54820800

約数和(自身を除く): 33911240

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 53, 56, 70, 106, 140, 212, 265, 280, 371, 424, 530, 742, 1060, 1409, 1484, 1855, 2120, 2818, 2968, 3710, 5636, 7045, 7420, 9863, 11272, 14090, 14840, 19726, 28180, 39452, 49315, 56360, 74677, 78904, 98630, 149354, 197260, 298708, 373385, 394520, 522739, 597416, 746770, 1045478, 1493540, 2090956, 2613695, 2987080, 4181912, 5227390, 10454780, 20909560]

約数ペア:

[(1, 20909560), (2, 10454780), (4, 5227390), (5, 4181912), (7, 2987080), (8, 2613695), (10, 2090956), (14, 1493540), (20, 1045478), (28, 746770), (35, 597416), (40, 522739), (53, 394520), (56, 373385), (70, 298708), (106, 197260), (140, 149354), (212, 98630), (265, 78904), (280, 74677), (371, 56360), (424, 49315), (530, 39452), (742, 28180), (1060, 19726), (1409, 14840), (1484, 14090), (1855, 11272), (2120, 9863), (2818, 7420), (2968, 7045), (3710, 5636)]