20509600

素因数分解:

$2^5\times 5^2\times {\mathrm{31}}^1\times {\mathrm{827}}^1$

素因数の和:878

約数の個数: 72

約数和(自身を含む): 51746688

約数和(自身を除く): 31237088

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 31, 32, 40, 50, 62, 80, 100, 124, 155, 160, 200, 248, 310, 400, 496, 620, 775, 800, 827, 992, 1240, 1550, 1654, 2480, 3100, 3308, 4135, 4960, 6200, 6616, 8270, 12400, 13232, 16540, 20675, 24800, 25637, 26464, 33080, 41350, 51274, 66160, 82700, 102548, 128185, 132320, 165400, 205096, 256370, 330800, 410192, 512740, 640925, 661600, 820384, 1025480, 1281850, 2050960, 2563700, 4101920, 5127400, 10254800, 20509600]

約数ペア:

[(1, 20509600), (2, 10254800), (4, 5127400), (5, 4101920), (8, 2563700), (10, 2050960), (16, 1281850), (20, 1025480), (25, 820384), (31, 661600), (32, 640925), (40, 512740), (50, 410192), (62, 330800), (80, 256370), (100, 205096), (124, 165400), (155, 132320), (160, 128185), (200, 102548), (248, 82700), (310, 66160), (400, 51274), (496, 41350), (620, 33080), (775, 26464), (800, 25637), (827, 24800), (992, 20675), (1240, 16540), (1550, 13232), (1654, 12400), (2480, 8270), (3100, 6616), (3308, 6200), (4135, 4960)]