20941515

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{3499}}^1$

素因数の和:3536

約数の個数: 48

約数和(自身を含む): 43680000

約数和(自身を除く): 22738485

約数列:

[1, 3, 5, 7, 9, 15, 19, 21, 35, 45, 57, 63, 95, 105, 133, 171, 285, 315, 399, 665, 855, 1197, 1995, 3499, 5985, 10497, 17495, 24493, 31491, 52485, 66481, 73479, 122465, 157455, 199443, 220437, 332405, 367395, 465367, 598329, 997215, 1102185, 1396101, 2326835, 2991645, 4188303, 6980505, 20941515]

約数ペア:

[(1, 20941515), (3, 6980505), (5, 4188303), (7, 2991645), (9, 2326835), (15, 1396101), (19, 1102185), (21, 997215), (35, 598329), (45, 465367), (57, 367395), (63, 332405), (95, 220437), (105, 199443), (133, 157455), (171, 122465), (285, 73479), (315, 66481), (399, 52485), (665, 31491), (855, 24493), (1197, 17495), (1995, 10497), (3499, 5985)]