21971900

素因数分解:

$2^2\times 5^2\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{233}}^1$

素因数の和:311

約数の個数: 72

約数和(自身を含む): 51184224

約数和(自身を除く): 29212324

約数列:

[1, 2, 4, 5, 10, 20, 23, 25, 41, 46, 50, 82, 92, 100, 115, 164, 205, 230, 233, 410, 460, 466, 575, 820, 932, 943, 1025, 1150, 1165, 1886, 2050, 2300, 2330, 3772, 4100, 4660, 4715, 5359, 5825, 9430, 9553, 10718, 11650, 18860, 19106, 21436, 23300, 23575, 26795, 38212, 47150, 47765, 53590, 94300, 95530, 107180, 133975, 191060, 219719, 238825, 267950, 439438, 477650, 535900, 878876, 955300, 1098595, 2197190, 4394380, 5492975, 10985950, 21971900]

約数ペア:

[(1, 21971900), (2, 10985950), (4, 5492975), (5, 4394380), (10, 2197190), (20, 1098595), (23, 955300), (25, 878876), (41, 535900), (46, 477650), (50, 439438), (82, 267950), (92, 238825), (100, 219719), (115, 191060), (164, 133975), (205, 107180), (230, 95530), (233, 94300), (410, 53590), (460, 47765), (466, 47150), (575, 38212), (820, 26795), (932, 23575), (943, 23300), (1025, 21436), (1150, 19106), (1165, 18860), (1886, 11650), (2050, 10718), (2300, 9553), (2330, 9430), (3772, 5825), (4100, 5359), (4660, 4715)]