20991432015

素因数分解:

$3^3\times 5^1\times {\mathrm{53}}^1\times {\mathrm{1087}}^1\times {\mathrm{2699}}^1$

素因数の和:3853

約数の個数: 64

約数和(自身を含む): 38071296000

約数和(自身を除く): 17079863985

約数列:

[1, 3, 5, 9, 15, 27, 45, 53, 135, 159, 265, 477, 795, 1087, 1431, 2385, 2699, 3261, 5435, 7155, 8097, 9783, 13495, 16305, 24291, 29349, 40485, 48915, 57611, 72873, 121455, 143047, 146745, 172833, 288055, 364365, 429141, 518499, 715235, 864165, 1287423, 1555497, 2145705, 2592495, 2933813, 3862269, 6437115, 7777485, 8801439, 14669065, 19311345, 26404317, 44007195, 79212951, 132021585, 155492089, 396064755, 466476267, 777460445, 1399428801, 2332381335, 4198286403, 6997144005, 20991432015]

約数ペア:

[(1, 20991432015), (3, 6997144005), (5, 4198286403), (9, 2332381335), (15, 1399428801), (27, 777460445), (45, 466476267), (53, 396064755), (135, 155492089), (159, 132021585), (265, 79212951), (477, 44007195), (795, 26404317), (1087, 19311345), (1431, 14669065), (2385, 8801439), (2699, 7777485), (3261, 6437115), (5435, 3862269), (7155, 2933813), (8097, 2592495), (9783, 2145705), (13495, 1555497), (16305, 1287423), (24291, 864165), (29349, 715235), (40485, 518499), (48915, 429141), (57611, 364365), (72873, 288055), (121455, 172833), (143047, 146745)]