19717555

素因数分解:

$5^1\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{109}}^1$

素因数の和:172

約数の個数: 48

約数和(自身を含む): 29494080

約数和(自身を除く): 9776525

約数列:

[1, 5, 11, 13, 23, 55, 65, 109, 115, 121, 143, 253, 299, 545, 605, 715, 1199, 1265, 1417, 1495, 1573, 2507, 2783, 3289, 5995, 7085, 7865, 12535, 13189, 13915, 15587, 16445, 27577, 32591, 36179, 65945, 77935, 137885, 162955, 171457, 180895, 303347, 358501, 857285, 1516735, 1792505, 3943511, 19717555]

約数ペア:

[(1, 19717555), (5, 3943511), (11, 1792505), (13, 1516735), (23, 857285), (55, 358501), (65, 303347), (109, 180895), (115, 171457), (121, 162955), (143, 137885), (253, 77935), (299, 65945), (545, 36179), (605, 32591), (715, 27577), (1199, 16445), (1265, 15587), (1417, 13915), (1495, 13189), (1573, 12535), (2507, 7865), (2783, 7085), (3289, 5995)]