18017890

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{233}}^1$

素因数の和:307

約数の個数: 64

約数和(自身を含む): 38413440

約数和(自身を除く): 20395550

約数列:

[1, 2, 5, 10, 11, 19, 22, 37, 38, 55, 74, 95, 110, 185, 190, 209, 233, 370, 407, 418, 466, 703, 814, 1045, 1165, 1406, 2035, 2090, 2330, 2563, 3515, 4070, 4427, 5126, 7030, 7733, 8621, 8854, 12815, 15466, 17242, 22135, 25630, 38665, 43105, 44270, 48697, 77330, 86210, 94831, 97394, 163799, 189662, 243485, 327598, 474155, 486970, 818995, 948310, 1637990, 1801789, 3603578, 9008945, 18017890]

約数ペア:

[(1, 18017890), (2, 9008945), (5, 3603578), (10, 1801789), (11, 1637990), (19, 948310), (22, 818995), (37, 486970), (38, 474155), (55, 327598), (74, 243485), (95, 189662), (110, 163799), (185, 97394), (190, 94831), (209, 86210), (233, 77330), (370, 48697), (407, 44270), (418, 43105), (466, 38665), (703, 25630), (814, 22135), (1045, 17242), (1165, 15466), (1406, 12815), (2035, 8854), (2090, 8621), (2330, 7733), (2563, 7030), (3515, 5126), (4070, 4427)]