21215740

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{11657}}^1$

素因数の和:11686

約数の個数: 48

約数和(自身を含む): 54839232

約数和(自身を除く): 33623492

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 52, 65, 70, 91, 130, 140, 182, 260, 364, 455, 910, 1820, 11657, 23314, 46628, 58285, 81599, 116570, 151541, 163198, 233140, 303082, 326396, 407995, 606164, 757705, 815990, 1060787, 1515410, 1631980, 2121574, 3030820, 4243148, 5303935, 10607870, 21215740]

約数ペア:

[(1, 21215740), (2, 10607870), (4, 5303935), (5, 4243148), (7, 3030820), (10, 2121574), (13, 1631980), (14, 1515410), (20, 1060787), (26, 815990), (28, 757705), (35, 606164), (52, 407995), (65, 326396), (70, 303082), (91, 233140), (130, 163198), (140, 151541), (182, 116570), (260, 81599), (364, 58285), (455, 46628), (910, 23314), (1820, 11657)]