21729730

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{281}}^1$

素因数の和:355

約数の個数: 64

約数和(自身を含む): 46293120

約数和(自身を除く): 24563390

約数列:

[1, 2, 5, 10, 11, 19, 22, 37, 38, 55, 74, 95, 110, 185, 190, 209, 281, 370, 407, 418, 562, 703, 814, 1045, 1405, 1406, 2035, 2090, 2810, 3091, 3515, 4070, 5339, 6182, 7030, 7733, 10397, 10678, 15455, 15466, 20794, 26695, 30910, 38665, 51985, 53390, 58729, 77330, 103970, 114367, 117458, 197543, 228734, 293645, 395086, 571835, 587290, 987715, 1143670, 1975430, 2172973, 4345946, 10864865, 21729730]

約数ペア:

[(1, 21729730), (2, 10864865), (5, 4345946), (10, 2172973), (11, 1975430), (19, 1143670), (22, 987715), (37, 587290), (38, 571835), (55, 395086), (74, 293645), (95, 228734), (110, 197543), (185, 117458), (190, 114367), (209, 103970), (281, 77330), (370, 58729), (407, 53390), (418, 51985), (562, 38665), (703, 30910), (814, 26695), (1045, 20794), (1405, 15466), (1406, 15455), (2035, 10678), (2090, 10397), (2810, 7733), (3091, 7030), (3515, 6182), (4070, 5339)]