18512890

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{89}}^1$

素因数の和:199

約数の個数: 64

約数和(自身を含む): 38568960

約数和(自身を除く): 20056070

約数列:

[1, 2, 5, 10, 11, 22, 31, 55, 61, 62, 89, 110, 122, 155, 178, 305, 310, 341, 445, 610, 671, 682, 890, 979, 1342, 1705, 1891, 1958, 2759, 3355, 3410, 3782, 4895, 5429, 5518, 6710, 9455, 9790, 10858, 13795, 18910, 20801, 27145, 27590, 30349, 41602, 54290, 59719, 60698, 104005, 119438, 151745, 168299, 208010, 298595, 303490, 336598, 597190, 841495, 1682990, 1851289, 3702578, 9256445, 18512890]

約数ペア:

[(1, 18512890), (2, 9256445), (5, 3702578), (10, 1851289), (11, 1682990), (22, 841495), (31, 597190), (55, 336598), (61, 303490), (62, 298595), (89, 208010), (110, 168299), (122, 151745), (155, 119438), (178, 104005), (305, 60698), (310, 59719), (341, 54290), (445, 41602), (610, 30349), (671, 27590), (682, 27145), (890, 20801), (979, 18910), (1342, 13795), (1705, 10858), (1891, 9790), (1958, 9455), (2759, 6710), (3355, 5518), (3410, 5429), (3782, 4895)]