20400240

素因数分解:

$2^4\times 3^1\times 5^1\times 7^1\times {\mathrm{12143}}^1$

素因数の和:12166

約数の個数: 80

約数和(自身を含む): 72281088

約数和(自身を除く): 51880848

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 30, 35, 40, 42, 48, 56, 60, 70, 80, 84, 105, 112, 120, 140, 168, 210, 240, 280, 336, 420, 560, 840, 1680, 12143, 24286, 36429, 48572, 60715, 72858, 85001, 97144, 121430, 145716, 170002, 182145, 194288, 242860, 255003, 291432, 340004, 364290, 425005, 485720, 510006, 582864, 680008, 728580, 850010, 971440, 1020012, 1275015, 1360016, 1457160, 1700020, 2040024, 2550030, 2914320, 3400040, 4080048, 5100060, 6800080, 10200120, 20400240]

約数ペア:

[(1, 20400240), (2, 10200120), (3, 6800080), (4, 5100060), (5, 4080048), (6, 3400040), (7, 2914320), (8, 2550030), (10, 2040024), (12, 1700020), (14, 1457160), (15, 1360016), (16, 1275015), (20, 1020012), (21, 971440), (24, 850010), (28, 728580), (30, 680008), (35, 582864), (40, 510006), (42, 485720), (48, 425005), (56, 364290), (60, 340004), (70, 291432), (80, 255003), (84, 242860), (105, 194288), (112, 182145), (120, 170002), (140, 145716), (168, 121430), (210, 97144), (240, 85001), (280, 72858), (336, 60715), (420, 48572), (560, 36429), (840, 24286), (1680, 12143)]