20994330

素因数分解:

$2^1\times 3^1\times 5^1\times 7^1\times {\mathrm{257}}^1\times {\mathrm{389}}^1$

素因数の和:663

約数の個数: 64

約数和(自身を含む): 57957120

約数和(自身を除く): 36962790

約数列:

[1, 2, 3, 5, 6, 7, 10, 14, 15, 21, 30, 35, 42, 70, 105, 210, 257, 389, 514, 771, 778, 1167, 1285, 1542, 1799, 1945, 2334, 2570, 2723, 3598, 3855, 3890, 5397, 5446, 5835, 7710, 8169, 8995, 10794, 11670, 13615, 16338, 17990, 26985, 27230, 40845, 53970, 81690, 99973, 199946, 299919, 499865, 599838, 699811, 999730, 1399622, 1499595, 2099433, 2999190, 3499055, 4198866, 6998110, 10497165, 20994330]

約数ペア:

[(1, 20994330), (2, 10497165), (3, 6998110), (5, 4198866), (6, 3499055), (7, 2999190), (10, 2099433), (14, 1499595), (15, 1399622), (21, 999730), (30, 699811), (35, 599838), (42, 499865), (70, 299919), (105, 199946), (210, 99973), (257, 81690), (389, 53970), (514, 40845), (771, 27230), (778, 26985), (1167, 17990), (1285, 16338), (1542, 13615), (1799, 11670), (1945, 10794), (2334, 8995), (2570, 8169), (2723, 7710), (3598, 5835), (3855, 5446), (3890, 5397)]