20853216

素因数分解:

$2^5\times 3^2\times {\mathrm{61}}^1\times {\mathrm{1187}}^1$

素因数の和:1264

約数の個数: 72

約数和(自身を含む): 60324264

約数和(自身を除く): 39471048

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 32, 36, 48, 61, 72, 96, 122, 144, 183, 244, 288, 366, 488, 549, 732, 976, 1098, 1187, 1464, 1952, 2196, 2374, 2928, 3561, 4392, 4748, 5856, 7122, 8784, 9496, 10683, 14244, 17568, 18992, 21366, 28488, 37984, 42732, 56976, 72407, 85464, 113952, 144814, 170928, 217221, 289628, 341856, 434442, 579256, 651663, 868884, 1158512, 1303326, 1737768, 2317024, 2606652, 3475536, 5213304, 6951072, 10426608, 20853216]

約数ペア:

[(1, 20853216), (2, 10426608), (3, 6951072), (4, 5213304), (6, 3475536), (8, 2606652), (9, 2317024), (12, 1737768), (16, 1303326), (18, 1158512), (24, 868884), (32, 651663), (36, 579256), (48, 434442), (61, 341856), (72, 289628), (96, 217221), (122, 170928), (144, 144814), (183, 113952), (244, 85464), (288, 72407), (366, 56976), (488, 42732), (549, 37984), (732, 28488), (976, 21366), (1098, 18992), (1187, 17568), (1464, 14244), (1952, 10683), (2196, 9496), (2374, 8784), (2928, 7122), (3561, 5856), (4392, 4748)]