81271980

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{12203}}^1$

素因数の和:12255

約数の個数: 72

約数和(自身を含む): 253208592

約数和(自身を除く): 171936612

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 37, 45, 60, 74, 90, 111, 148, 180, 185, 222, 333, 370, 444, 555, 666, 740, 1110, 1332, 1665, 2220, 3330, 6660, 12203, 24406, 36609, 48812, 61015, 73218, 109827, 122030, 146436, 183045, 219654, 244060, 366090, 439308, 451511, 549135, 732180, 903022, 1098270, 1354533, 1806044, 2196540, 2257555, 2709066, 4063599, 4515110, 5418132, 6772665, 8127198, 9030220, 13545330, 16254396, 20317995, 27090660, 40635990, 81271980]

約数ペア:

[(1, 81271980), (2, 40635990), (3, 27090660), (4, 20317995), (5, 16254396), (6, 13545330), (9, 9030220), (10, 8127198), (12, 6772665), (15, 5418132), (18, 4515110), (20, 4063599), (30, 2709066), (36, 2257555), (37, 2196540), (45, 1806044), (60, 1354533), (74, 1098270), (90, 903022), (111, 732180), (148, 549135), (180, 451511), (185, 439308), (222, 366090), (333, 244060), (370, 219654), (444, 183045), (555, 146436), (666, 122030), (740, 109827), (1110, 73218), (1332, 61015), (1665, 48812), (2220, 36609), (3330, 24406), (6660, 12203)]