21554120

素因数分解:

$2^3\times 5^1\times 7^3\times {\mathrm{1571}}^1$

素因数の和:1603

約数の個数: 64

約数和(自身を含む): 56592000

約数和(自身を除く): 35037880

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 70, 98, 140, 196, 245, 280, 343, 392, 490, 686, 980, 1372, 1571, 1715, 1960, 2744, 3142, 3430, 6284, 6860, 7855, 10997, 12568, 13720, 15710, 21994, 31420, 43988, 54985, 62840, 76979, 87976, 109970, 153958, 219940, 307916, 384895, 439880, 538853, 615832, 769790, 1077706, 1539580, 2155412, 2694265, 3079160, 4310824, 5388530, 10777060, 21554120]

約数ペア:

[(1, 21554120), (2, 10777060), (4, 5388530), (5, 4310824), (7, 3079160), (8, 2694265), (10, 2155412), (14, 1539580), (20, 1077706), (28, 769790), (35, 615832), (40, 538853), (49, 439880), (56, 384895), (70, 307916), (98, 219940), (140, 153958), (196, 109970), (245, 87976), (280, 76979), (343, 62840), (392, 54985), (490, 43988), (686, 31420), (980, 21994), (1372, 15710), (1571, 13720), (1715, 12568), (1960, 10997), (2744, 7855), (3142, 6860), (3430, 6284)]