20129900

素因数分解:

$2^2\times 5^2\times 7^1\times {\mathrm{149}}^1\times {\mathrm{193}}^1$

素因数の和:363

約数の個数: 72

約数和(自身を含む): 50517600

約数和(自身を除く): 30387700

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 25, 28, 35, 50, 70, 100, 140, 149, 175, 193, 298, 350, 386, 596, 700, 745, 772, 965, 1043, 1351, 1490, 1930, 2086, 2702, 2980, 3725, 3860, 4172, 4825, 5215, 5404, 6755, 7450, 9650, 10430, 13510, 14900, 19300, 20860, 26075, 27020, 28757, 33775, 52150, 57514, 67550, 104300, 115028, 135100, 143785, 201299, 287570, 402598, 575140, 718925, 805196, 1006495, 1437850, 2012990, 2875700, 4025980, 5032475, 10064950, 20129900]

約数ペア:

[(1, 20129900), (2, 10064950), (4, 5032475), (5, 4025980), (7, 2875700), (10, 2012990), (14, 1437850), (20, 1006495), (25, 805196), (28, 718925), (35, 575140), (50, 402598), (70, 287570), (100, 201299), (140, 143785), (149, 135100), (175, 115028), (193, 104300), (298, 67550), (350, 57514), (386, 52150), (596, 33775), (700, 28757), (745, 27020), (772, 26075), (965, 20860), (1043, 19300), (1351, 14900), (1490, 13510), (1930, 10430), (2086, 9650), (2702, 7450), (2980, 6755), (3725, 5404), (3860, 5215), (4172, 4825)]