400800720

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{1670003}}^1$

素因数の和:1670019

約数の個数: 40

約数和(自身を含む): 1242482976

約数和(自身を除く): 841682256

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 240, 1670003, 3340006, 5010009, 6680012, 8350015, 10020018, 13360024, 16700030, 20040036, 25050045, 26720048, 33400060, 40080072, 50100090, 66800120, 80160144, 100200180, 133600240, 200400360, 400800720]

約数ペア:

[(1, 400800720), (2, 200400360), (3, 133600240), (4, 100200180), (5, 80160144), (6, 66800120), (8, 50100090), (10, 40080072), (12, 33400060), (15, 26720048), (16, 25050045), (20, 20040036), (24, 16700030), (30, 13360024), (40, 10020018), (48, 8350015), (60, 6680012), (80, 5010009), (120, 3340006), (240, 1670003)]