21665320

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{983}}^1$

素因数の和:1042

約数の個数: 64

約数和(自身を含む): 53136000

約数和(自身を除く): 31470680

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 29, 38, 40, 58, 76, 95, 116, 145, 152, 190, 232, 290, 380, 551, 580, 760, 983, 1102, 1160, 1966, 2204, 2755, 3932, 4408, 4915, 5510, 7864, 9830, 11020, 18677, 19660, 22040, 28507, 37354, 39320, 57014, 74708, 93385, 114028, 142535, 149416, 186770, 228056, 285070, 373540, 541633, 570140, 747080, 1083266, 1140280, 2166532, 2708165, 4333064, 5416330, 10832660, 21665320]

約数ペア:

[(1, 21665320), (2, 10832660), (4, 5416330), (5, 4333064), (8, 2708165), (10, 2166532), (19, 1140280), (20, 1083266), (29, 747080), (38, 570140), (40, 541633), (58, 373540), (76, 285070), (95, 228056), (116, 186770), (145, 149416), (152, 142535), (190, 114028), (232, 93385), (290, 74708), (380, 57014), (551, 39320), (580, 37354), (760, 28507), (983, 22040), (1102, 19660), (1160, 18677), (1966, 11020), (2204, 9830), (2755, 7864), (3932, 5510), (4408, 4915)]