20921565

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{10487}}^1$

素因数の和:10521

約数の個数: 32

約数和(自身を含む): 40273920

約数和(自身を除く): 19352355

約数列:

[1, 3, 5, 7, 15, 19, 21, 35, 57, 95, 105, 133, 285, 399, 665, 1995, 10487, 31461, 52435, 73409, 157305, 199253, 220227, 367045, 597759, 996265, 1101135, 1394771, 2988795, 4184313, 6973855, 20921565]

約数ペア:

[(1, 20921565), (3, 6973855), (5, 4184313), (7, 2988795), (15, 1394771), (19, 1101135), (21, 996265), (35, 597759), (57, 367045), (95, 220227), (105, 199253), (133, 157305), (285, 73409), (399, 52435), (665, 31461), (1995, 10487)]