21531195

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{2357}}^1$

素因数の和:2404

約数の個数: 48

約数和(自身を含む): 44141760

約数和(自身を除く): 22610565

約数列:

[1, 3, 5, 7, 9, 15, 21, 29, 35, 45, 63, 87, 105, 145, 203, 261, 315, 435, 609, 1015, 1305, 1827, 2357, 3045, 7071, 9135, 11785, 16499, 21213, 35355, 49497, 68353, 82495, 106065, 148491, 205059, 247485, 341765, 478471, 615177, 742455, 1025295, 1435413, 2392355, 3075885, 4306239, 7177065, 21531195]

約数ペア:

[(1, 21531195), (3, 7177065), (5, 4306239), (7, 3075885), (9, 2392355), (15, 1435413), (21, 1025295), (29, 742455), (35, 615177), (45, 478471), (63, 341765), (87, 247485), (105, 205059), (145, 148491), (203, 106065), (261, 82495), (315, 68353), (435, 49497), (609, 35355), (1015, 21213), (1305, 16499), (1827, 11785), (2357, 9135), (3045, 7071)]