21993075

素因数分解:

$3^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{103}}^1$

素因数の和:205

約数の個数: 72

約数和(自身を含む): 43420832

約数和(自身を除く): 21427757

約数列:

[1, 3, 5, 9, 13, 15, 25, 39, 45, 65, 73, 75, 103, 117, 195, 219, 225, 309, 325, 365, 515, 585, 657, 927, 949, 975, 1095, 1339, 1545, 1825, 2575, 2847, 2925, 3285, 4017, 4635, 4745, 5475, 6695, 7519, 7725, 8541, 12051, 14235, 16425, 20085, 22557, 23175, 23725, 33475, 37595, 42705, 60255, 67671, 71175, 97747, 100425, 112785, 187975, 213525, 293241, 301275, 338355, 488735, 563925, 879723, 1466205, 1691775, 2443675, 4398615, 7331025, 21993075]

約数ペア:

[(1, 21993075), (3, 7331025), (5, 4398615), (9, 2443675), (13, 1691775), (15, 1466205), (25, 879723), (39, 563925), (45, 488735), (65, 338355), (73, 301275), (75, 293241), (103, 213525), (117, 187975), (195, 112785), (219, 100425), (225, 97747), (309, 71175), (325, 67671), (365, 60255), (515, 42705), (585, 37595), (657, 33475), (927, 23725), (949, 23175), (975, 22557), (1095, 20085), (1339, 16425), (1545, 14235), (1825, 12051), (2575, 8541), (2847, 7725), (2925, 7519), (3285, 6695), (4017, 5475), (4635, 4745)]