18621880

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{79}}^1\times {\mathrm{83}}^1$

素因数の和:244

約数の個数: 64

約数和(自身を含む): 43545600

約数和(自身を除く): 24923720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 79, 83, 142, 158, 166, 284, 316, 332, 355, 395, 415, 568, 632, 664, 710, 790, 830, 1420, 1580, 1660, 2840, 3160, 3320, 5609, 5893, 6557, 11218, 11786, 13114, 22436, 23572, 26228, 28045, 29465, 32785, 44872, 47144, 52456, 56090, 58930, 65570, 112180, 117860, 131140, 224360, 235720, 262280, 465547, 931094, 1862188, 2327735, 3724376, 4655470, 9310940, 18621880]

約数ペア:

[(1, 18621880), (2, 9310940), (4, 4655470), (5, 3724376), (8, 2327735), (10, 1862188), (20, 931094), (40, 465547), (71, 262280), (79, 235720), (83, 224360), (142, 131140), (158, 117860), (166, 112180), (284, 65570), (316, 58930), (332, 56090), (355, 52456), (395, 47144), (415, 44872), (568, 32785), (632, 29465), (664, 28045), (710, 26228), (790, 23572), (830, 22436), (1420, 13114), (1580, 11786), (1660, 11218), (2840, 6557), (3160, 5893), (3320, 5609)]