21004308

素因数分解:

$2^2\times 3^2\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{1213}}^1$

素因数の和:1273

約数の個数: 72

約数和(自身を含む): 58772168

約数和(自身を除く): 37767860

約数列:

[1, 2, 3, 4, 6, 9, 12, 13, 18, 26, 36, 37, 39, 52, 74, 78, 111, 117, 148, 156, 222, 234, 333, 444, 468, 481, 666, 962, 1213, 1332, 1443, 1924, 2426, 2886, 3639, 4329, 4852, 5772, 7278, 8658, 10917, 14556, 15769, 17316, 21834, 31538, 43668, 44881, 47307, 63076, 89762, 94614, 134643, 141921, 179524, 189228, 269286, 283842, 403929, 538572, 567684, 583453, 807858, 1166906, 1615716, 1750359, 2333812, 3500718, 5251077, 7001436, 10502154, 21004308]

約数ペア:

[(1, 21004308), (2, 10502154), (3, 7001436), (4, 5251077), (6, 3500718), (9, 2333812), (12, 1750359), (13, 1615716), (18, 1166906), (26, 807858), (36, 583453), (37, 567684), (39, 538572), (52, 403929), (74, 283842), (78, 269286), (111, 189228), (117, 179524), (148, 141921), (156, 134643), (222, 94614), (234, 89762), (333, 63076), (444, 47307), (468, 44881), (481, 43668), (666, 31538), (962, 21834), (1213, 17316), (1332, 15769), (1443, 14556), (1924, 10917), (2426, 8658), (2886, 7278), (3639, 5772), (4329, 4852)]