20402060

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{61}}^1\times {\mathrm{2389}}^1$

素因数の和:2466

約数の個数: 48

約数和(自身を含む): 49788480

約数和(自身を除く): 29386420

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 61, 70, 122, 140, 244, 305, 427, 610, 854, 1220, 1708, 2135, 2389, 4270, 4778, 8540, 9556, 11945, 16723, 23890, 33446, 47780, 66892, 83615, 145729, 167230, 291458, 334460, 582916, 728645, 1020103, 1457290, 2040206, 2914580, 4080412, 5100515, 10201030, 20402060]

約数ペア:

[(1, 20402060), (2, 10201030), (4, 5100515), (5, 4080412), (7, 2914580), (10, 2040206), (14, 1457290), (20, 1020103), (28, 728645), (35, 582916), (61, 334460), (70, 291458), (122, 167230), (140, 145729), (244, 83615), (305, 66892), (427, 47780), (610, 33446), (854, 23890), (1220, 16723), (1708, 11945), (2135, 9556), (2389, 8540), (4270, 4778)]