21155280

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{181}}^1\times {\mathrm{487}}^1$

素因数の和:684

約数の個数: 80

約数和(自身を含む): 66079104

約数和(自身を除く): 44923824

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 181, 240, 362, 487, 543, 724, 905, 974, 1086, 1448, 1461, 1810, 1948, 2172, 2435, 2715, 2896, 2922, 3620, 3896, 4344, 4870, 5430, 5844, 7240, 7305, 7792, 8688, 9740, 10860, 11688, 14480, 14610, 19480, 21720, 23376, 29220, 38960, 43440, 58440, 88147, 116880, 176294, 264441, 352588, 440735, 528882, 705176, 881470, 1057764, 1322205, 1410352, 1762940, 2115528, 2644410, 3525880, 4231056, 5288820, 7051760, 10577640, 21155280]

約数ペア:

[(1, 21155280), (2, 10577640), (3, 7051760), (4, 5288820), (5, 4231056), (6, 3525880), (8, 2644410), (10, 2115528), (12, 1762940), (15, 1410352), (16, 1322205), (20, 1057764), (24, 881470), (30, 705176), (40, 528882), (48, 440735), (60, 352588), (80, 264441), (120, 176294), (181, 116880), (240, 88147), (362, 58440), (487, 43440), (543, 38960), (724, 29220), (905, 23376), (974, 21720), (1086, 19480), (1448, 14610), (1461, 14480), (1810, 11688), (1948, 10860), (2172, 9740), (2435, 8688), (2715, 7792), (2896, 7305), (2922, 7240), (3620, 5844), (3896, 5430), (4344, 4870)]