201481780

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{239}}^1\times {\mathrm{691}}^1$

素因数の和:1000

約数の個数: 48

約数和(自身を含む): 432472320

約数和(自身を除く): 230990540

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 239, 244, 305, 478, 610, 691, 956, 1195, 1220, 1382, 2390, 2764, 3455, 4780, 6910, 13820, 14579, 29158, 42151, 58316, 72895, 84302, 145790, 165149, 168604, 210755, 291580, 330298, 421510, 660596, 825745, 843020, 1651490, 3302980, 10074089, 20148178, 40296356, 50370445, 100740890, 201481780]

約数ペア:

[(1, 201481780), (2, 100740890), (4, 50370445), (5, 40296356), (10, 20148178), (20, 10074089), (61, 3302980), (122, 1651490), (239, 843020), (244, 825745), (305, 660596), (478, 421510), (610, 330298), (691, 291580), (956, 210755), (1195, 168604), (1220, 165149), (1382, 145790), (2390, 84302), (2764, 72895), (3455, 58316), (4780, 42151), (6910, 29158), (13820, 14579)]