21453180

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{7297}}^1$

素因数の和:7323

約数の個数: 72

約数和(自身を含む): 69885648

約数和(自身を除く): 48432468

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 49, 60, 70, 84, 98, 105, 140, 147, 196, 210, 245, 294, 420, 490, 588, 735, 980, 1470, 2940, 7297, 14594, 21891, 29188, 36485, 43782, 51079, 72970, 87564, 102158, 109455, 145940, 153237, 204316, 218910, 255395, 306474, 357553, 437820, 510790, 612948, 715106, 766185, 1021580, 1072659, 1430212, 1532370, 1787765, 2145318, 3064740, 3575530, 4290636, 5363295, 7151060, 10726590, 21453180]

約数ペア:

[(1, 21453180), (2, 10726590), (3, 7151060), (4, 5363295), (5, 4290636), (6, 3575530), (7, 3064740), (10, 2145318), (12, 1787765), (14, 1532370), (15, 1430212), (20, 1072659), (21, 1021580), (28, 766185), (30, 715106), (35, 612948), (42, 510790), (49, 437820), (60, 357553), (70, 306474), (84, 255395), (98, 218910), (105, 204316), (140, 153237), (147, 145940), (196, 109455), (210, 102158), (245, 87564), (294, 72970), (420, 51079), (490, 43782), (588, 36485), (735, 29188), (980, 21891), (1470, 14594), (2940, 7297)]