20550990

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{89}}^1\times {\mathrm{179}}^1$

素因数の和:321

約数の個数: 64

約数和(自身を含む): 51321600

約数和(自身を除く): 30770610

約数列:

[1, 2, 3, 5, 6, 10, 15, 30, 43, 86, 89, 129, 178, 179, 215, 258, 267, 358, 430, 445, 534, 537, 645, 890, 895, 1074, 1290, 1335, 1790, 2670, 2685, 3827, 5370, 7654, 7697, 11481, 15394, 15931, 19135, 22962, 23091, 31862, 38270, 38485, 46182, 47793, 57405, 76970, 79655, 95586, 114810, 115455, 159310, 230910, 238965, 477930, 685033, 1370066, 2055099, 3425165, 4110198, 6850330, 10275495, 20550990]

約数ペア:

[(1, 20550990), (2, 10275495), (3, 6850330), (5, 4110198), (6, 3425165), (10, 2055099), (15, 1370066), (30, 685033), (43, 477930), (86, 238965), (89, 230910), (129, 159310), (178, 115455), (179, 114810), (215, 95586), (258, 79655), (267, 76970), (358, 57405), (430, 47793), (445, 46182), (534, 38485), (537, 38270), (645, 31862), (890, 23091), (895, 22962), (1074, 19135), (1290, 15931), (1335, 15394), (1790, 11481), (2670, 7697), (2685, 7654), (3827, 5370)]