408039980

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{10789}}^1$

素因数の和:10890

約数の個数: 48

約数和(自身を含む): 899109120

約数和(自身を除く): 491069140

約数列:

[1, 2, 4, 5, 10, 20, 31, 61, 62, 122, 124, 155, 244, 305, 310, 610, 620, 1220, 1891, 3782, 7564, 9455, 10789, 18910, 21578, 37820, 43156, 53945, 107890, 215780, 334459, 658129, 668918, 1316258, 1337836, 1672295, 2632516, 3290645, 3344590, 6581290, 6689180, 13162580, 20401999, 40803998, 81607996, 102009995, 204019990, 408039980]

約数ペア:

[(1, 408039980), (2, 204019990), (4, 102009995), (5, 81607996), (10, 40803998), (20, 20401999), (31, 13162580), (61, 6689180), (62, 6581290), (122, 3344590), (124, 3290645), (155, 2632516), (244, 1672295), (305, 1337836), (310, 1316258), (610, 668918), (620, 658129), (1220, 334459), (1891, 215780), (3782, 107890), (7564, 53945), (9455, 43156), (10789, 37820), (18910, 21578)]