21270522

素因数分解:

$2^1\times 3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{163}}^1\times {\mathrm{239}}^1$

素因数の和:427

約数の個数: 64

約数和(自身を含む): 52899840

約数和(自身を除く): 31629318

約数列:

[1, 2, 3, 6, 7, 13, 14, 21, 26, 39, 42, 78, 91, 163, 182, 239, 273, 326, 478, 489, 546, 717, 978, 1141, 1434, 1673, 2119, 2282, 3107, 3346, 3423, 4238, 5019, 6214, 6357, 6846, 9321, 10038, 12714, 14833, 18642, 21749, 29666, 38957, 43498, 44499, 65247, 77914, 88998, 116871, 130494, 233742, 272699, 506441, 545398, 818097, 1012882, 1519323, 1636194, 3038646, 3545087, 7090174, 10635261, 21270522]

約数ペア:

[(1, 21270522), (2, 10635261), (3, 7090174), (6, 3545087), (7, 3038646), (13, 1636194), (14, 1519323), (21, 1012882), (26, 818097), (39, 545398), (42, 506441), (78, 272699), (91, 233742), (163, 130494), (182, 116871), (239, 88998), (273, 77914), (326, 65247), (478, 44499), (489, 43498), (546, 38957), (717, 29666), (978, 21749), (1141, 18642), (1434, 14833), (1673, 12714), (2119, 10038), (2282, 9321), (3107, 6846), (3346, 6357), (3423, 6214), (4238, 5019)]