21971859

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^2\times {\mathrm{41}}^1\times {\mathrm{151}}^1$

素因数の和:228

約数の個数: 48

約数和(自身を含む): 37384704

約数和(自身を除く): 15412845

約数列:

[1, 3, 7, 13, 21, 39, 41, 91, 123, 151, 169, 273, 287, 453, 507, 533, 861, 1057, 1183, 1599, 1963, 3171, 3549, 3731, 5889, 6191, 6929, 11193, 13741, 18573, 20787, 25519, 41223, 43337, 48503, 76557, 80483, 130011, 145509, 178633, 241449, 535899, 563381, 1046279, 1690143, 3138837, 7323953, 21971859]

約数ペア:

[(1, 21971859), (3, 7323953), (7, 3138837), (13, 1690143), (21, 1046279), (39, 563381), (41, 535899), (91, 241449), (123, 178633), (151, 145509), (169, 130011), (273, 80483), (287, 76557), (453, 48503), (507, 43337), (533, 41223), (861, 25519), (1057, 20787), (1183, 18573), (1599, 13741), (1963, 11193), (3171, 6929), (3549, 6191), (3731, 5889)]