81026540

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{449}}^1\times {\mathrm{1289}}^1$

素因数の和:1754

約数の個数: 48

約数和(自身を含む): 195048000

約数和(自身を除く): 114021460

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 449, 898, 1289, 1796, 2245, 2578, 3143, 4490, 5156, 6286, 6445, 8980, 9023, 12572, 12890, 15715, 18046, 25780, 31430, 36092, 45115, 62860, 90230, 180460, 578761, 1157522, 2315044, 2893805, 4051327, 5787610, 8102654, 11575220, 16205308, 20256635, 40513270, 81026540]

約数ペア:

[(1, 81026540), (2, 40513270), (4, 20256635), (5, 16205308), (7, 11575220), (10, 8102654), (14, 5787610), (20, 4051327), (28, 2893805), (35, 2315044), (70, 1157522), (140, 578761), (449, 180460), (898, 90230), (1289, 62860), (1796, 45115), (2245, 36092), (2578, 31430), (3143, 25780), (4490, 18046), (5156, 15715), (6286, 12890), (6445, 12572), (8980, 9023)]