400800

素因数分解:

$2^5\times 3^1\times 5^2\times {\mathrm{167}}^1$

素因数の和:190

約数の個数: 72

約数和(自身を含む): 1312416

約数和(自身を除く): 911616

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 25, 30, 32, 40, 48, 50, 60, 75, 80, 96, 100, 120, 150, 160, 167, 200, 240, 300, 334, 400, 480, 501, 600, 668, 800, 835, 1002, 1200, 1336, 1670, 2004, 2400, 2505, 2672, 3340, 4008, 4175, 5010, 5344, 6680, 8016, 8350, 10020, 12525, 13360, 16032, 16700, 20040, 25050, 26720, 33400, 40080, 50100, 66800, 80160, 100200, 133600, 200400, 400800]

約数ペア:

[(1, 400800), (2, 200400), (3, 133600), (4, 100200), (5, 80160), (6, 66800), (8, 50100), (10, 40080), (12, 33400), (15, 26720), (16, 25050), (20, 20040), (24, 16700), (25, 16032), (30, 13360), (32, 12525), (40, 10020), (48, 8350), (50, 8016), (60, 6680), (75, 5344), (80, 5010), (96, 4175), (100, 4008), (120, 3340), (150, 2672), (160, 2505), (167, 2400), (200, 2004), (240, 1670), (300, 1336), (334, 1200), (400, 1002), (480, 835), (501, 800), (600, 668)]