21528400

素因数分解:

$2^4\times 5^2\times {\mathrm{107}}^1\times {\mathrm{503}}^1$

素因数の和:628

約数の個数: 60

約数和(自身を含む): 52309152

約数和(自身を除く): 30780752

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 107, 200, 214, 400, 428, 503, 535, 856, 1006, 1070, 1712, 2012, 2140, 2515, 2675, 4024, 4280, 5030, 5350, 8048, 8560, 10060, 10700, 12575, 20120, 21400, 25150, 40240, 42800, 50300, 53821, 100600, 107642, 201200, 215284, 269105, 430568, 538210, 861136, 1076420, 1345525, 2152840, 2691050, 4305680, 5382100, 10764200, 21528400]

約数ペア:

[(1, 21528400), (2, 10764200), (4, 5382100), (5, 4305680), (8, 2691050), (10, 2152840), (16, 1345525), (20, 1076420), (25, 861136), (40, 538210), (50, 430568), (80, 269105), (100, 215284), (107, 201200), (200, 107642), (214, 100600), (400, 53821), (428, 50300), (503, 42800), (535, 40240), (856, 25150), (1006, 21400), (1070, 20120), (1712, 12575), (2012, 10700), (2140, 10060), (2515, 8560), (2675, 8048), (4024, 5350), (4280, 5030)]