661240

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{271}}^1$

素因数の和:343

約数の個数: 32

約数和(自身を含む): 1517760

約数和(自身を除く): 856520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 244, 271, 305, 488, 542, 610, 1084, 1220, 1355, 2168, 2440, 2710, 5420, 10840, 16531, 33062, 66124, 82655, 132248, 165310, 330620, 661240]

約数ペア:

[(1, 661240), (2, 330620), (4, 165310), (5, 132248), (8, 82655), (10, 66124), (20, 33062), (40, 16531), (61, 10840), (122, 5420), (244, 2710), (271, 2440), (305, 2168), (488, 1355), (542, 1220), (610, 1084)]