18419895

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{37}}^2$

素因数の和:121

約数の個数: 72

約数和(自身を含む): 36874656

約数和(自身を除く): 18454761

約数列:

[1, 3, 5, 9, 13, 15, 23, 37, 39, 45, 65, 69, 111, 115, 117, 185, 195, 207, 299, 333, 345, 481, 555, 585, 851, 897, 1035, 1369, 1443, 1495, 1665, 2405, 2553, 2691, 4107, 4255, 4329, 4485, 6845, 7215, 7659, 11063, 12321, 12765, 13455, 17797, 20535, 21645, 31487, 33189, 38295, 53391, 55315, 61605, 88985, 94461, 99567, 157435, 160173, 165945, 266955, 283383, 409331, 472305, 497835, 800865, 1227993, 1416915, 2046655, 3683979, 6139965, 18419895]

約数ペア:

[(1, 18419895), (3, 6139965), (5, 3683979), (9, 2046655), (13, 1416915), (15, 1227993), (23, 800865), (37, 497835), (39, 472305), (45, 409331), (65, 283383), (69, 266955), (111, 165945), (115, 160173), (117, 157435), (185, 99567), (195, 94461), (207, 88985), (299, 61605), (333, 55315), (345, 53391), (481, 38295), (555, 33189), (585, 31487), (851, 21645), (897, 20535), (1035, 17797), (1369, 13455), (1443, 12765), (1495, 12321), (1665, 11063), (2405, 7659), (2553, 7215), (2691, 6845), (4107, 4485), (4255, 4329)]