28181860

素因数分解:

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

素因数の和:365

約数の個数: 72

約数和(自身を含む): 69665400

約数和(自身を除く): 41483540

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 149, 193, 196, 245, 298, 386, 490, 596, 745, 772, 965, 980, 1043, 1351, 1490, 1930, 2086, 2702, 2980, 3860, 4172, 5215, 5404, 6755, 7301, 9457, 10430, 13510, 14602, 18914, 20860, 27020, 28757, 29204, 36505, 37828, 47285, 57514, 73010, 94570, 115028, 143785, 146020, 189140, 201299, 287570, 402598, 575140, 805196, 1006495, 1409093, 2012990, 2818186, 4025980, 5636372, 7045465, 14090930, 28181860]

約数ペア:

[(1, 28181860), (2, 14090930), (4, 7045465), (5, 5636372), (7, 4025980), (10, 2818186), (14, 2012990), (20, 1409093), (28, 1006495), (35, 805196), (49, 575140), (70, 402598), (98, 287570), (140, 201299), (149, 189140), (193, 146020), (196, 143785), (245, 115028), (298, 94570), (386, 73010), (490, 57514), (596, 47285), (745, 37828), (772, 36505), (965, 29204), (980, 28757), (1043, 27020), (1351, 20860), (1490, 18914), (1930, 14602), (2086, 13510), (2702, 10430), (2980, 9457), (3860, 7301), (4172, 6755), (5215, 5404)]