181503980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{197}}^1\times {\mathrm{6581}}^1$

素因数の和:6794

約数の個数: 48

約数和(自身を含む): 437887296

約数和(自身を除く): 256383316

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 197, 394, 788, 985, 1379, 1970, 2758, 3940, 5516, 6581, 6895, 13162, 13790, 26324, 27580, 32905, 46067, 65810, 92134, 131620, 184268, 230335, 460670, 921340, 1296457, 2592914, 5185828, 6482285, 9075199, 12964570, 18150398, 25929140, 36300796, 45375995, 90751990, 181503980]

約数ペア:

[(1, 181503980), (2, 90751990), (4, 45375995), (5, 36300796), (7, 25929140), (10, 18150398), (14, 12964570), (20, 9075199), (28, 6482285), (35, 5185828), (70, 2592914), (140, 1296457), (197, 921340), (394, 460670), (788, 230335), (985, 184268), (1379, 131620), (1970, 92134), (2758, 65810), (3940, 46067), (5516, 32905), (6581, 27580), (6895, 26324), (13162, 13790)]