18309820

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{109}}^1\times {\mathrm{227}}^1$

素因数の和:382

約数の個数: 48

約数和(自身を含む): 40027680

約数和(自身を除く): 21717860

約数列:

[1, 2, 4, 5, 10, 20, 37, 74, 109, 148, 185, 218, 227, 370, 436, 454, 545, 740, 908, 1090, 1135, 2180, 2270, 4033, 4540, 8066, 8399, 16132, 16798, 20165, 24743, 33596, 40330, 41995, 49486, 80660, 83990, 98972, 123715, 167980, 247430, 494860, 915491, 1830982, 3661964, 4577455, 9154910, 18309820]

約数ペア:

[(1, 18309820), (2, 9154910), (4, 4577455), (5, 3661964), (10, 1830982), (20, 915491), (37, 494860), (74, 247430), (109, 167980), (148, 123715), (185, 98972), (218, 83990), (227, 80660), (370, 49486), (436, 41995), (454, 40330), (545, 33596), (740, 24743), (908, 20165), (1090, 16798), (1135, 16132), (2180, 8399), (2270, 8066), (4033, 4540)]