21249540

素因数分解:

$2^2\times 3^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{1009}}^1$

素因数の和:1043

約数の個数: 120

約数和(自身を含む): 71859480

約数和(自身を除く): 50609940

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 13, 15, 18, 20, 26, 27, 30, 36, 39, 45, 52, 54, 60, 65, 78, 81, 90, 108, 117, 130, 135, 156, 162, 180, 195, 234, 260, 270, 324, 351, 390, 405, 468, 540, 585, 702, 780, 810, 1009, 1053, 1170, 1404, 1620, 1755, 2018, 2106, 2340, 3027, 3510, 4036, 4212, 5045, 5265, 6054, 7020, 9081, 10090, 10530, 12108, 13117, 15135, 18162, 20180, 21060, 26234, 27243, 30270, 36324, 39351, 45405, 52468, 54486, 60540, 65585, 78702, 81729, 90810, 108972, 118053, 131170, 136215, 157404, 163458, 181620, 196755, 236106, 262340, 272430, 326916, 354159, 393510, 408645, 472212, 544860, 590265, 708318, 787020, 817290, 1062477, 1180530, 1416636, 1634580, 1770795, 2124954, 2361060, 3541590, 4249908, 5312385, 7083180, 10624770, 21249540]

約数ペア:

[(1, 21249540), (2, 10624770), (3, 7083180), (4, 5312385), (5, 4249908), (6, 3541590), (9, 2361060), (10, 2124954), (12, 1770795), (13, 1634580), (15, 1416636), (18, 1180530), (20, 1062477), (26, 817290), (27, 787020), (30, 708318), (36, 590265), (39, 544860), (45, 472212), (52, 408645), (54, 393510), (60, 354159), (65, 326916), (78, 272430), (81, 262340), (90, 236106), (108, 196755), (117, 181620), (130, 163458), (135, 157404), (156, 136215), (162, 131170), (180, 118053), (195, 108972), (234, 90810), (260, 81729), (270, 78702), (324, 65585), (351, 60540), (390, 54486), (405, 52468), (468, 45405), (540, 39351), (585, 36324), (702, 30270), (780, 27243), (810, 26234), (1009, 21060), (1053, 20180), (1170, 18162), (1404, 15135), (1620, 13117), (1755, 12108), (2018, 10530), (2106, 10090), (2340, 9081), (3027, 7020), (3510, 6054), (4036, 5265), (4212, 5045)]