20663896175

素因数分解:

$5^2\times {\mathrm{13}}^2\times {\mathrm{43}}^1\times {\mathrm{107}}^1\times {\mathrm{1063}}^1$

素因数の和:1249

約数の個数: 72

約数和(自身を含む): 28683414144

約数和(自身を除く): 8019517969

約数列:

[1, 5, 13, 25, 43, 65, 107, 169, 215, 325, 535, 559, 845, 1063, 1075, 1391, 2675, 2795, 4225, 4601, 5315, 6955, 7267, 13819, 13975, 18083, 23005, 26575, 34775, 36335, 45709, 59813, 69095, 90415, 113741, 115025, 179647, 181675, 228545, 299065, 345475, 452075, 568705, 594217, 777569, 898235, 1142725, 1478633, 1495325, 2843525, 2971085, 3887845, 4491175, 4890863, 7393165, 7724821, 14855425, 19222229, 19439225, 24454315, 36965825, 38624105, 63581219, 96111145, 122271575, 193120525, 317906095, 480555725, 826555847, 1589530475, 4132779235, 20663896175]

約数ペア:

[(1, 20663896175), (5, 4132779235), (13, 1589530475), (25, 826555847), (43, 480555725), (65, 317906095), (107, 193120525), (169, 122271575), (215, 96111145), (325, 63581219), (535, 38624105), (559, 36965825), (845, 24454315), (1063, 19439225), (1075, 19222229), (1391, 14855425), (2675, 7724821), (2795, 7393165), (4225, 4890863), (4601, 4491175), (5315, 3887845), (6955, 2971085), (7267, 2843525), (13819, 1495325), (13975, 1478633), (18083, 1142725), (23005, 898235), (26575, 777569), (34775, 594217), (36335, 568705), (45709, 452075), (59813, 345475), (69095, 299065), (90415, 228545), (113741, 181675), (115025, 179647)]