81515320

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{283}}^1\times {\mathrm{379}}^1$

素因数の和:692

約数の個数: 64

約数和(自身を含む): 194256000

約数和(自身を除く): 112740680

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 152, 190, 283, 379, 380, 566, 758, 760, 1132, 1415, 1516, 1895, 2264, 2830, 3032, 3790, 5377, 5660, 7201, 7580, 10754, 11320, 14402, 15160, 21508, 26885, 28804, 36005, 43016, 53770, 57608, 72010, 107257, 107540, 144020, 214514, 215080, 288040, 429028, 536285, 858056, 1072570, 2037883, 2145140, 4075766, 4290280, 8151532, 10189415, 16303064, 20378830, 40757660, 81515320]

約数ペア:

[(1, 81515320), (2, 40757660), (4, 20378830), (5, 16303064), (8, 10189415), (10, 8151532), (19, 4290280), (20, 4075766), (38, 2145140), (40, 2037883), (76, 1072570), (95, 858056), (152, 536285), (190, 429028), (283, 288040), (379, 215080), (380, 214514), (566, 144020), (758, 107540), (760, 107257), (1132, 72010), (1415, 57608), (1516, 53770), (1895, 43016), (2264, 36005), (2830, 28804), (3032, 26885), (3790, 21508), (5377, 15160), (5660, 14402), (7201, 11320), (7580, 10754)]