20892915

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{881}}^1$

素因数の和:940

約数の個数: 48

約数和(自身を含む): 39626496

約数和(自身を除く): 18733581

約数列:

[1, 3, 5, 9, 15, 17, 31, 45, 51, 85, 93, 153, 155, 255, 279, 465, 527, 765, 881, 1395, 1581, 2635, 2643, 4405, 4743, 7905, 7929, 13215, 14977, 23715, 27311, 39645, 44931, 74885, 81933, 134793, 136555, 224655, 245799, 409665, 464287, 673965, 1228995, 1392861, 2321435, 4178583, 6964305, 20892915]

約数ペア:

[(1, 20892915), (3, 6964305), (5, 4178583), (9, 2321435), (15, 1392861), (17, 1228995), (31, 673965), (45, 464287), (51, 409665), (85, 245799), (93, 224655), (153, 136555), (155, 134793), (255, 81933), (279, 74885), (465, 44931), (527, 39645), (765, 27311), (881, 23715), (1395, 14977), (1581, 13215), (2635, 7929), (2643, 7905), (4405, 4743)]