21428540

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{269}}^1\times {\mathrm{569}}^1$

素因数の和:854

約数の個数: 48

約数和(自身を含む): 51710400

約数和(自身を除く): 30281860

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 269, 538, 569, 1076, 1138, 1345, 1883, 2276, 2690, 2845, 3766, 3983, 5380, 5690, 7532, 7966, 9415, 11380, 15932, 18830, 19915, 37660, 39830, 79660, 153061, 306122, 612244, 765305, 1071427, 1530610, 2142854, 3061220, 4285708, 5357135, 10714270, 21428540]

約数ペア:

[(1, 21428540), (2, 10714270), (4, 5357135), (5, 4285708), (7, 3061220), (10, 2142854), (14, 1530610), (20, 1071427), (28, 765305), (35, 612244), (70, 306122), (140, 153061), (269, 79660), (538, 39830), (569, 37660), (1076, 19915), (1138, 18830), (1345, 15932), (1883, 11380), (2276, 9415), (2690, 7966), (2845, 7532), (3766, 5690), (3983, 5380)]