18115780

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{479}}^1$

素因数の和:580

約数の個数: 48

約数和(自身を含む): 39997440

約数和(自身を除く): 21881660

約数列:

[1, 2, 4, 5, 10, 20, 31, 61, 62, 122, 124, 155, 244, 305, 310, 479, 610, 620, 958, 1220, 1891, 1916, 2395, 3782, 4790, 7564, 9455, 9580, 14849, 18910, 29219, 29698, 37820, 58438, 59396, 74245, 116876, 146095, 148490, 292190, 296980, 584380, 905789, 1811578, 3623156, 4528945, 9057890, 18115780]

約数ペア:

[(1, 18115780), (2, 9057890), (4, 4528945), (5, 3623156), (10, 1811578), (20, 905789), (31, 584380), (61, 296980), (62, 292190), (122, 148490), (124, 146095), (155, 116876), (244, 74245), (305, 59396), (310, 58438), (479, 37820), (610, 29698), (620, 29219), (958, 18910), (1220, 14849), (1891, 9580), (1916, 9455), (2395, 7564), (3782, 4790)]