20105475

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{1213}}^1$

素因数の和:1256

約数の個数: 48

約数和(自身を含む): 37935072

約数和(自身を除く): 17829597

約数列:

[1, 3, 5, 13, 15, 17, 25, 39, 51, 65, 75, 85, 195, 221, 255, 325, 425, 663, 975, 1105, 1213, 1275, 3315, 3639, 5525, 6065, 15769, 16575, 18195, 20621, 30325, 47307, 61863, 78845, 90975, 103105, 236535, 268073, 309315, 394225, 515525, 804219, 1182675, 1340365, 1546575, 4021095, 6701825, 20105475]

約数ペア:

[(1, 20105475), (3, 6701825), (5, 4021095), (13, 1546575), (15, 1340365), (17, 1182675), (25, 804219), (39, 515525), (51, 394225), (65, 309315), (75, 268073), (85, 236535), (195, 103105), (221, 90975), (255, 78845), (325, 61863), (425, 47307), (663, 30325), (975, 20621), (1105, 18195), (1213, 16575), (1275, 15769), (3315, 6065), (3639, 5525)]