21021408

素因数分解:

$2^5\times 3^2\times {\mathrm{47}}^1\times {\mathrm{1553}}^1$

素因数の和:1616

約数の個数: 72

約数和(自身を含む): 61090848

約数和(自身を除く): 40069440

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 32, 36, 47, 48, 72, 94, 96, 141, 144, 188, 282, 288, 376, 423, 564, 752, 846, 1128, 1504, 1553, 1692, 2256, 3106, 3384, 4512, 4659, 6212, 6768, 9318, 12424, 13536, 13977, 18636, 24848, 27954, 37272, 49696, 55908, 72991, 74544, 111816, 145982, 149088, 218973, 223632, 291964, 437946, 447264, 583928, 656919, 875892, 1167856, 1313838, 1751784, 2335712, 2627676, 3503568, 5255352, 7007136, 10510704, 21021408]

約数ペア:

[(1, 21021408), (2, 10510704), (3, 7007136), (4, 5255352), (6, 3503568), (8, 2627676), (9, 2335712), (12, 1751784), (16, 1313838), (18, 1167856), (24, 875892), (32, 656919), (36, 583928), (47, 447264), (48, 437946), (72, 291964), (94, 223632), (96, 218973), (141, 149088), (144, 145982), (188, 111816), (282, 74544), (288, 72991), (376, 55908), (423, 49696), (564, 37272), (752, 27954), (846, 24848), (1128, 18636), (1504, 13977), (1553, 13536), (1692, 12424), (2256, 9318), (3106, 6768), (3384, 6212), (4512, 4659)]