21455420

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{331}}^1\times {\mathrm{463}}^1$

素因数の和:810

約数の個数: 48

約数和(自身を含む): 51760128

約数和(自身を除く): 30304708

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 331, 463, 662, 926, 1324, 1655, 1852, 2315, 2317, 3241, 3310, 4630, 4634, 6482, 6620, 9260, 9268, 11585, 12964, 16205, 23170, 32410, 46340, 64820, 153253, 306506, 613012, 766265, 1072771, 1532530, 2145542, 3065060, 4291084, 5363855, 10727710, 21455420]

約数ペア:

[(1, 21455420), (2, 10727710), (4, 5363855), (5, 4291084), (7, 3065060), (10, 2145542), (14, 1532530), (20, 1072771), (28, 766265), (35, 613012), (70, 306506), (140, 153253), (331, 64820), (463, 46340), (662, 32410), (926, 23170), (1324, 16205), (1655, 12964), (1852, 11585), (2315, 9268), (2317, 9260), (3241, 6620), (3310, 6482), (4630, 4634)]