81976020

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{27883}}^1$

素因数の和:27909

約数の個数: 72

約数和(自身を含む): 267017184

約数和(自身を除く): 185041164

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 49, 60, 70, 84, 98, 105, 140, 147, 196, 210, 245, 294, 420, 490, 588, 735, 980, 1470, 2940, 27883, 55766, 83649, 111532, 139415, 167298, 195181, 278830, 334596, 390362, 418245, 557660, 585543, 780724, 836490, 975905, 1171086, 1366267, 1672980, 1951810, 2342172, 2732534, 2927715, 3903620, 4098801, 5465068, 5855430, 6831335, 8197602, 11710860, 13662670, 16395204, 20494005, 27325340, 40988010, 81976020]

約数ペア:

[(1, 81976020), (2, 40988010), (3, 27325340), (4, 20494005), (5, 16395204), (6, 13662670), (7, 11710860), (10, 8197602), (12, 6831335), (14, 5855430), (15, 5465068), (20, 4098801), (21, 3903620), (28, 2927715), (30, 2732534), (35, 2342172), (42, 1951810), (49, 1672980), (60, 1366267), (70, 1171086), (84, 975905), (98, 836490), (105, 780724), (140, 585543), (147, 557660), (196, 418245), (210, 390362), (245, 334596), (294, 278830), (420, 195181), (490, 167298), (588, 139415), (735, 111532), (980, 83649), (1470, 55766), (2940, 27883)]