21000657654

素因数分解:

$2^1\times 3^2\times {\mathrm{37}}^1\times {\mathrm{397}}^1\times {\mathrm{79427}}^1$

素因数の和:79869

約数の個数: 48

約数和(自身を含む): 46849493808

約数和(自身を除く): 25848836154

約数列:

[1, 2, 3, 6, 9, 18, 37, 74, 111, 222, 333, 397, 666, 794, 1191, 2382, 3573, 7146, 14689, 29378, 44067, 79427, 88134, 132201, 158854, 238281, 264402, 476562, 714843, 1429686, 2938799, 5877598, 8816397, 17632794, 26449191, 31532519, 52898382, 63065038, 94597557, 189195114, 283792671, 567585342, 1166703203, 2333406406, 3500109609, 7000219218, 10500328827, 21000657654]

約数ペア:

[(1, 21000657654), (2, 10500328827), (3, 7000219218), (6, 3500109609), (9, 2333406406), (18, 1166703203), (37, 567585342), (74, 283792671), (111, 189195114), (222, 94597557), (333, 63065038), (397, 52898382), (666, 31532519), (794, 26449191), (1191, 17632794), (2382, 8816397), (3573, 5877598), (7146, 2938799), (14689, 1429686), (29378, 714843), (44067, 476562), (79427, 264402), (88134, 238281), (132201, 158854)]