397720

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{163}}^1$

素因数の和:235

約数の個数: 32

約数和(自身を含む): 915120

約数和(自身を除く): 517400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 163, 244, 305, 326, 488, 610, 652, 815, 1220, 1304, 1630, 2440, 3260, 6520, 9943, 19886, 39772, 49715, 79544, 99430, 198860, 397720]

約数ペア:

[(1, 397720), (2, 198860), (4, 99430), (5, 79544), (8, 49715), (10, 39772), (20, 19886), (40, 9943), (61, 6520), (122, 3260), (163, 2440), (244, 1630), (305, 1304), (326, 1220), (488, 815), (610, 652)]