21006885

素因数分解:

$3^1\times 5^1\times {\mathrm{47}}^1\times {\mathrm{83}}^1\times {\mathrm{359}}^1$

素因数の和:497

約数の個数: 32

約数和(自身を含む): 34836480

約数和(自身を除く): 13829595

約数列:

[1, 3, 5, 15, 47, 83, 141, 235, 249, 359, 415, 705, 1077, 1245, 1795, 3901, 5385, 11703, 16873, 19505, 29797, 50619, 58515, 84365, 89391, 148985, 253095, 446955, 1400459, 4201377, 7002295, 21006885]

約数ペア:

[(1, 21006885), (3, 7002295), (5, 4201377), (15, 1400459), (47, 446955), (83, 253095), (141, 148985), (235, 89391), (249, 84365), (359, 58515), (415, 50619), (705, 29797), (1077, 19505), (1245, 16873), (1795, 11703), (3901, 5385)]