21172880

素因数分解:

$2^4\times 5^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{311}}^1$

素因数の和:384

約数の個数: 80

約数和(自身を含む): 52925184

約数和(自身を除く): 31752304

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 37, 40, 46, 74, 80, 92, 115, 148, 184, 185, 230, 296, 311, 368, 370, 460, 592, 622, 740, 851, 920, 1244, 1480, 1555, 1702, 1840, 2488, 2960, 3110, 3404, 4255, 4976, 6220, 6808, 7153, 8510, 11507, 12440, 13616, 14306, 17020, 23014, 24880, 28612, 34040, 35765, 46028, 57224, 57535, 68080, 71530, 92056, 114448, 115070, 143060, 184112, 230140, 264661, 286120, 460280, 529322, 572240, 920560, 1058644, 1323305, 2117288, 2646610, 4234576, 5293220, 10586440, 21172880]

約数ペア:

[(1, 21172880), (2, 10586440), (4, 5293220), (5, 4234576), (8, 2646610), (10, 2117288), (16, 1323305), (20, 1058644), (23, 920560), (37, 572240), (40, 529322), (46, 460280), (74, 286120), (80, 264661), (92, 230140), (115, 184112), (148, 143060), (184, 115070), (185, 114448), (230, 92056), (296, 71530), (311, 68080), (368, 57535), (370, 57224), (460, 46028), (592, 35765), (622, 34040), (740, 28612), (851, 24880), (920, 23014), (1244, 17020), (1480, 14306), (1555, 13616), (1702, 12440), (1840, 11507), (2488, 8510), (2960, 7153), (3110, 6808), (3404, 6220), (4255, 4976)]