20000500

素因数分解:

$2^2\times 5^3\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{181}}^1$

素因数の和:230

約数の個数: 96

約数和(自身を含む): 50083488

約数和(自身を除く): 30082988

約数列:

[1, 2, 4, 5, 10, 13, 17, 20, 25, 26, 34, 50, 52, 65, 68, 85, 100, 125, 130, 170, 181, 221, 250, 260, 325, 340, 362, 425, 442, 500, 650, 724, 850, 884, 905, 1105, 1300, 1625, 1700, 1810, 2125, 2210, 2353, 3077, 3250, 3620, 4250, 4420, 4525, 4706, 5525, 6154, 6500, 8500, 9050, 9412, 11050, 11765, 12308, 15385, 18100, 22100, 22625, 23530, 27625, 30770, 40001, 45250, 47060, 55250, 58825, 61540, 76925, 80002, 90500, 110500, 117650, 153850, 160004, 200005, 235300, 294125, 307700, 384625, 400010, 588250, 769250, 800020, 1000025, 1176500, 1538500, 2000050, 4000100, 5000125, 10000250, 20000500]

約数ペア:

[(1, 20000500), (2, 10000250), (4, 5000125), (5, 4000100), (10, 2000050), (13, 1538500), (17, 1176500), (20, 1000025), (25, 800020), (26, 769250), (34, 588250), (50, 400010), (52, 384625), (65, 307700), (68, 294125), (85, 235300), (100, 200005), (125, 160004), (130, 153850), (170, 117650), (181, 110500), (221, 90500), (250, 80002), (260, 76925), (325, 61540), (340, 58825), (362, 55250), (425, 47060), (442, 45250), (500, 40001), (650, 30770), (724, 27625), (850, 23530), (884, 22625), (905, 22100), (1105, 18100), (1300, 15385), (1625, 12308), (1700, 11765), (1810, 11050), (2125, 9412), (2210, 9050), (2353, 8500), (3077, 6500), (3250, 6154), (3620, 5525), (4250, 4706), (4420, 4525)]