12919780

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{83}}^1\times {\mathrm{181}}^1$

素因数の和:316

約数の個数: 48

約数和(自身を含む): 28252224

約数和(自身を除く): 15332444

約数列:

[1, 2, 4, 5, 10, 20, 43, 83, 86, 166, 172, 181, 215, 332, 362, 415, 430, 724, 830, 860, 905, 1660, 1810, 3569, 3620, 7138, 7783, 14276, 15023, 15566, 17845, 30046, 31132, 35690, 38915, 60092, 71380, 75115, 77830, 150230, 155660, 300460, 645989, 1291978, 2583956, 3229945, 6459890, 12919780]

約数ペア:

[(1, 12919780), (2, 6459890), (4, 3229945), (5, 2583956), (10, 1291978), (20, 645989), (43, 300460), (83, 155660), (86, 150230), (166, 77830), (172, 75115), (181, 71380), (215, 60092), (332, 38915), (362, 35690), (415, 31132), (430, 30046), (724, 17845), (830, 15566), (860, 15023), (905, 14276), (1660, 7783), (1810, 7138), (3569, 3620)]