217620520

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{431}}^1\times {\mathrm{971}}^1$

素因数の和:1426

約数の個数: 64

約数和(自身を含む): 529079040

約数和(自身を除く): 311458520

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 431, 520, 862, 971, 1724, 1942, 2155, 3448, 3884, 4310, 4855, 5603, 7768, 8620, 9710, 11206, 12623, 17240, 19420, 22412, 25246, 28015, 38840, 44824, 50492, 56030, 63115, 100984, 112060, 126230, 224120, 252460, 418501, 504920, 837002, 1674004, 2092505, 3348008, 4185010, 5440513, 8370020, 10881026, 16740040, 21762052, 27202565, 43524104, 54405130, 108810260, 217620520]

約数ペア:

[(1, 217620520), (2, 108810260), (4, 54405130), (5, 43524104), (8, 27202565), (10, 21762052), (13, 16740040), (20, 10881026), (26, 8370020), (40, 5440513), (52, 4185010), (65, 3348008), (104, 2092505), (130, 1674004), (260, 837002), (431, 504920), (520, 418501), (862, 252460), (971, 224120), (1724, 126230), (1942, 112060), (2155, 100984), (3448, 63115), (3884, 56030), (4310, 50492), (4855, 44824), (5603, 38840), (7768, 28015), (8620, 25246), (9710, 22412), (11206, 19420), (12623, 17240)]