20760140

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{107}}^1\times {\mathrm{109}}^1$

素因数の和:314

約数の個数: 48

約数和(自身を含む): 44906400

約数和(自身を除く): 24146260

約数列:

[1, 2, 4, 5, 10, 20, 89, 107, 109, 178, 214, 218, 356, 428, 436, 445, 535, 545, 890, 1070, 1090, 1780, 2140, 2180, 9523, 9701, 11663, 19046, 19402, 23326, 38092, 38804, 46652, 47615, 48505, 58315, 95230, 97010, 116630, 190460, 194020, 233260, 1038007, 2076014, 4152028, 5190035, 10380070, 20760140]

約数ペア:

[(1, 20760140), (2, 10380070), (4, 5190035), (5, 4152028), (10, 2076014), (20, 1038007), (89, 233260), (107, 194020), (109, 190460), (178, 116630), (214, 97010), (218, 95230), (356, 58315), (428, 48505), (436, 47615), (445, 46652), (535, 38804), (545, 38092), (890, 23326), (1070, 19402), (1090, 19046), (1780, 11663), (2140, 9701), (2180, 9523)]