28640556

素因数分解:

$2^2\times 3^2\times 7^1\times {\mathrm{89}}^1\times {\mathrm{1277}}^1$

素因数の和:1383

約数の個数: 72

約数和(自身を含む): 83734560

約数和(自身を除く): 55094004

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 28, 36, 42, 63, 84, 89, 126, 178, 252, 267, 356, 534, 623, 801, 1068, 1246, 1277, 1602, 1869, 2492, 2554, 3204, 3738, 3831, 5108, 5607, 7476, 7662, 8939, 11214, 11493, 15324, 17878, 22428, 22986, 26817, 35756, 45972, 53634, 80451, 107268, 113653, 160902, 227306, 321804, 340959, 454612, 681918, 795571, 1022877, 1363836, 1591142, 2045754, 2386713, 3182284, 4091508, 4773426, 7160139, 9546852, 14320278, 28640556]

約数ペア:

[(1, 28640556), (2, 14320278), (3, 9546852), (4, 7160139), (6, 4773426), (7, 4091508), (9, 3182284), (12, 2386713), (14, 2045754), (18, 1591142), (21, 1363836), (28, 1022877), (36, 795571), (42, 681918), (63, 454612), (84, 340959), (89, 321804), (126, 227306), (178, 160902), (252, 113653), (267, 107268), (356, 80451), (534, 53634), (623, 45972), (801, 35756), (1068, 26817), (1246, 22986), (1277, 22428), (1602, 17878), (1869, 15324), (2492, 11493), (2554, 11214), (3204, 8939), (3738, 7662), (3831, 7476), (5108, 5607)]