21295820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{11701}}^1$

素因数の和:11730

約数の個数: 48

約数和(自身を含む): 55046208

約数和(自身を除く): 33750388

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, 11701, 23402, 46804, 58505, 81907, 117010, 152113, 163814, 234020, 304226, 327628, 409535, 608452, 760565, 819070, 1064791, 1521130, 1638140, 2129582, 3042260, 4259164, 5323955, 10647910, 21295820]

約数ペア:

[(1, 21295820), (2, 10647910), (4, 5323955), (5, 4259164), (7, 3042260), (10, 2129582), (13, 1638140), (14, 1521130), (20, 1064791), (26, 819070), (28, 760565), (35, 608452), (52, 409535), (65, 327628), (70, 304226), (91, 234020), (130, 163814), (140, 152113), (182, 117010), (260, 81907), (364, 58505), (455, 46804), (910, 23402), (1820, 11701)]