18312021

素因数分解:

$3^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{257}}^1$

素因数の和:315

約数の個数: 64

約数和(自身を含む): 34675200

約数和(自身を除く): 16363179

約数列:

[1, 3, 7, 9, 13, 21, 27, 29, 39, 63, 87, 91, 117, 189, 203, 257, 261, 273, 351, 377, 609, 771, 783, 819, 1131, 1799, 1827, 2313, 2457, 2639, 3341, 3393, 5397, 5481, 6939, 7453, 7917, 10023, 10179, 16191, 22359, 23387, 23751, 30069, 48573, 52171, 67077, 70161, 71253, 90207, 96889, 156513, 201231, 210483, 290667, 469539, 631449, 678223, 872001, 1408617, 2034669, 2616003, 6104007, 18312021]

約数ペア:

[(1, 18312021), (3, 6104007), (7, 2616003), (9, 2034669), (13, 1408617), (21, 872001), (27, 678223), (29, 631449), (39, 469539), (63, 290667), (87, 210483), (91, 201231), (117, 156513), (189, 96889), (203, 90207), (257, 71253), (261, 70161), (273, 67077), (351, 52171), (377, 48573), (609, 30069), (771, 23751), (783, 23387), (819, 22359), (1131, 16191), (1799, 10179), (1827, 10023), (2313, 7917), (2457, 7453), (2639, 6939), (3341, 5481), (3393, 5397)]