21399420

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{50951}}^1$

素因数の和:50970

約数の個数: 48

約数和(自身を含む): 68479488

約数和(自身を除く): 47080068

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 50951, 101902, 152853, 203804, 254755, 305706, 356657, 509510, 611412, 713314, 764265, 1019020, 1069971, 1426628, 1528530, 1783285, 2139942, 3057060, 3566570, 4279884, 5349855, 7133140, 10699710, 21399420]

約数ペア:

[(1, 21399420), (2, 10699710), (3, 7133140), (4, 5349855), (5, 4279884), (6, 3566570), (7, 3057060), (10, 2139942), (12, 1783285), (14, 1528530), (15, 1426628), (20, 1069971), (21, 1019020), (28, 764265), (30, 713314), (35, 611412), (42, 509510), (60, 356657), (70, 305706), (84, 254755), (105, 203804), (140, 152853), (210, 101902), (420, 50951)]