81758460

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{27809}}^1$

素因数の和:27835

約数の個数: 72

約数和(自身を含む): 266308560

約数和(自身を除く): 184550100

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, 27809, 55618, 83427, 111236, 139045, 166854, 194663, 278090, 333708, 389326, 417135, 556180, 583989, 778652, 834270, 973315, 1167978, 1362641, 1668540, 1946630, 2335956, 2725282, 2919945, 3893260, 4087923, 5450564, 5839890, 6813205, 8175846, 11679780, 13626410, 16351692, 20439615, 27252820, 40879230, 81758460]

約数ペア:

[(1, 81758460), (2, 40879230), (3, 27252820), (4, 20439615), (5, 16351692), (6, 13626410), (7, 11679780), (10, 8175846), (12, 6813205), (14, 5839890), (15, 5450564), (20, 4087923), (21, 3893260), (28, 2919945), (30, 2725282), (35, 2335956), (42, 1946630), (49, 1668540), (60, 1362641), (70, 1167978), (84, 973315), (98, 834270), (105, 778652), (140, 583989), (147, 556180), (196, 417135), (210, 389326), (245, 333708), (294, 278090), (420, 194663), (490, 166854), (588, 139045), (735, 111236), (980, 83427), (1470, 55618), (2940, 27809)]