21213840

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{157}}^1\times {\mathrm{563}}^1$

素因数の和:736

約数の個数: 80

約数和(自身を含む): 66299328

約数和(自身を除く): 45085488

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 157, 240, 314, 471, 563, 628, 785, 942, 1126, 1256, 1570, 1689, 1884, 2252, 2355, 2512, 2815, 3140, 3378, 3768, 4504, 4710, 5630, 6280, 6756, 7536, 8445, 9008, 9420, 11260, 12560, 13512, 16890, 18840, 22520, 27024, 33780, 37680, 45040, 67560, 88391, 135120, 176782, 265173, 353564, 441955, 530346, 707128, 883910, 1060692, 1325865, 1414256, 1767820, 2121384, 2651730, 3535640, 4242768, 5303460, 7071280, 10606920, 21213840]

約数ペア:

[(1, 21213840), (2, 10606920), (3, 7071280), (4, 5303460), (5, 4242768), (6, 3535640), (8, 2651730), (10, 2121384), (12, 1767820), (15, 1414256), (16, 1325865), (20, 1060692), (24, 883910), (30, 707128), (40, 530346), (48, 441955), (60, 353564), (80, 265173), (120, 176782), (157, 135120), (240, 88391), (314, 67560), (471, 45040), (563, 37680), (628, 33780), (785, 27024), (942, 22520), (1126, 18840), (1256, 16890), (1570, 13512), (1689, 12560), (1884, 11260), (2252, 9420), (2355, 9008), (2512, 8445), (2815, 7536), (3140, 6756), (3378, 6280), (3768, 5630), (4504, 4710)]