20717172

素因数分解:

$2^2\times 3^2\times 7^1\times {\mathrm{229}}^1\times {\mathrm{359}}^1$

素因数の和:605

約数の個数: 72

約数和(自身を含む): 60278400

約数和(自身を除く): 39561228

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 28, 36, 42, 63, 84, 126, 229, 252, 359, 458, 687, 718, 916, 1077, 1374, 1436, 1603, 2061, 2154, 2513, 2748, 3206, 3231, 4122, 4308, 4809, 5026, 6412, 6462, 7539, 8244, 9618, 10052, 12924, 14427, 15078, 19236, 22617, 28854, 30156, 45234, 57708, 82211, 90468, 164422, 246633, 328844, 493266, 575477, 739899, 986532, 1150954, 1479798, 1726431, 2301908, 2959596, 3452862, 5179293, 6905724, 10358586, 20717172]

約数ペア:

[(1, 20717172), (2, 10358586), (3, 6905724), (4, 5179293), (6, 3452862), (7, 2959596), (9, 2301908), (12, 1726431), (14, 1479798), (18, 1150954), (21, 986532), (28, 739899), (36, 575477), (42, 493266), (63, 328844), (84, 246633), (126, 164422), (229, 90468), (252, 82211), (359, 57708), (458, 45234), (687, 30156), (718, 28854), (916, 22617), (1077, 19236), (1374, 15078), (1436, 14427), (1603, 12924), (2061, 10052), (2154, 9618), (2513, 8244), (2748, 7539), (3206, 6462), (3231, 6412), (4122, 5026), (4308, 4809)]