21005608

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{109}}^2$

素因数の和:254

約数の個数: 48

約数和(自身を含む): 45325980

約数和(自身を除く): 24320372

約数列:

[1, 2, 4, 8, 13, 17, 26, 34, 52, 68, 104, 109, 136, 218, 221, 436, 442, 872, 884, 1417, 1768, 1853, 2834, 3706, 5668, 7412, 11336, 11881, 14824, 23762, 24089, 47524, 48178, 95048, 96356, 154453, 192712, 201977, 308906, 403954, 617812, 807908, 1235624, 1615816, 2625701, 5251402, 10502804, 21005608]

約数ペア:

[(1, 21005608), (2, 10502804), (4, 5251402), (8, 2625701), (13, 1615816), (17, 1235624), (26, 807908), (34, 617812), (52, 403954), (68, 308906), (104, 201977), (109, 192712), (136, 154453), (218, 96356), (221, 95048), (436, 48178), (442, 47524), (872, 24089), (884, 23762), (1417, 14824), (1768, 11881), (1853, 11336), (2834, 7412), (3706, 5668)]