31305320

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{73}}^1\times {\mathrm{151}}^1$

素因数の和:306

約数の個数: 64

約数和(自身を含む): 72887040

約数和(自身を除く): 41581720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 73, 142, 146, 151, 284, 292, 302, 355, 365, 568, 584, 604, 710, 730, 755, 1208, 1420, 1460, 1510, 2840, 2920, 3020, 5183, 6040, 10366, 10721, 11023, 20732, 21442, 22046, 25915, 41464, 42884, 44092, 51830, 53605, 55115, 85768, 88184, 103660, 107210, 110230, 207320, 214420, 220460, 428840, 440920, 782633, 1565266, 3130532, 3913165, 6261064, 7826330, 15652660, 31305320]

約数ペア:

[(1, 31305320), (2, 15652660), (4, 7826330), (5, 6261064), (8, 3913165), (10, 3130532), (20, 1565266), (40, 782633), (71, 440920), (73, 428840), (142, 220460), (146, 214420), (151, 207320), (284, 110230), (292, 107210), (302, 103660), (355, 88184), (365, 85768), (568, 55115), (584, 53605), (604, 51830), (710, 44092), (730, 42884), (755, 41464), (1208, 25915), (1420, 22046), (1460, 21442), (1510, 20732), (2840, 11023), (2920, 10721), (3020, 10366), (5183, 6040)]