18916495

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^2\times {\mathrm{19}}^1\times {\mathrm{53}}^1$

素因数の和:124

約数の個数: 48

約数和(自身を含む): 27851040

約数和(自身を除く): 8934545

約数列:

[1, 5, 13, 17, 19, 53, 65, 85, 95, 221, 247, 265, 289, 323, 689, 901, 1007, 1105, 1235, 1445, 1615, 3445, 3757, 4199, 4505, 5035, 5491, 11713, 13091, 15317, 17119, 18785, 20995, 27455, 58565, 65455, 71383, 76585, 85595, 199121, 222547, 291023, 356915, 995605, 1112735, 1455115, 3783299, 18916495]

約数ペア:

[(1, 18916495), (5, 3783299), (13, 1455115), (17, 1112735), (19, 995605), (53, 356915), (65, 291023), (85, 222547), (95, 199121), (221, 85595), (247, 76585), (265, 71383), (289, 65455), (323, 58565), (689, 27455), (901, 20995), (1007, 18785), (1105, 17119), (1235, 15317), (1445, 13091), (1615, 11713), (3445, 5491), (3757, 5035), (4199, 4505)]