20920970

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{31}}^2\times {\mathrm{311}}^1$

素因数の和:387

約数の個数: 48

約数和(自身を含む): 44613504

約数和(自身を除く): 23692534

約数列:

[1, 2, 5, 7, 10, 14, 31, 35, 62, 70, 155, 217, 310, 311, 434, 622, 961, 1085, 1555, 1922, 2170, 2177, 3110, 4354, 4805, 6727, 9610, 9641, 10885, 13454, 19282, 21770, 33635, 48205, 67270, 67487, 96410, 134974, 298871, 337435, 597742, 674870, 1494355, 2092097, 2988710, 4184194, 10460485, 20920970]

約数ペア:

[(1, 20920970), (2, 10460485), (5, 4184194), (7, 2988710), (10, 2092097), (14, 1494355), (31, 674870), (35, 597742), (62, 337435), (70, 298871), (155, 134974), (217, 96410), (310, 67487), (311, 67270), (434, 48205), (622, 33635), (961, 21770), (1085, 19282), (1555, 13454), (1922, 10885), (2170, 9641), (2177, 9610), (3110, 6727), (4354, 4805)]