20154940

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{67}}^1\times {\mathrm{89}}^1$

素因数の和:191

約数の個数: 72

約数和(自身を含む): 47038320

約数和(自身を除く): 26883380

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 67, 89, 130, 134, 169, 178, 260, 268, 335, 338, 356, 445, 670, 676, 845, 871, 890, 1157, 1340, 1690, 1742, 1780, 2314, 3380, 3484, 4355, 4628, 5785, 5963, 8710, 11323, 11570, 11926, 15041, 17420, 22646, 23140, 23852, 29815, 30082, 45292, 56615, 59630, 60164, 75205, 77519, 113230, 119260, 150410, 155038, 226460, 300820, 310076, 387595, 775190, 1007747, 1550380, 2015494, 4030988, 5038735, 10077470, 20154940]

約数ペア:

[(1, 20154940), (2, 10077470), (4, 5038735), (5, 4030988), (10, 2015494), (13, 1550380), (20, 1007747), (26, 775190), (52, 387595), (65, 310076), (67, 300820), (89, 226460), (130, 155038), (134, 150410), (169, 119260), (178, 113230), (260, 77519), (268, 75205), (335, 60164), (338, 59630), (356, 56615), (445, 45292), (670, 30082), (676, 29815), (845, 23852), (871, 23140), (890, 22646), (1157, 17420), (1340, 15041), (1690, 11926), (1742, 11570), (1780, 11323), (2314, 8710), (3380, 5963), (3484, 5785), (4355, 4628)]