19907220

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{257}}^1\times {\mathrm{1291}}^1$

素因数の和:1560

約数の個数: 48

約数和(自身を含む): 56000448

約数和(自身を除く): 36093228

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 257, 514, 771, 1028, 1285, 1291, 1542, 2570, 2582, 3084, 3855, 3873, 5140, 5164, 6455, 7710, 7746, 12910, 15420, 15492, 19365, 25820, 38730, 77460, 331787, 663574, 995361, 1327148, 1658935, 1990722, 3317870, 3981444, 4976805, 6635740, 9953610, 19907220]

約数ペア:

[(1, 19907220), (2, 9953610), (3, 6635740), (4, 4976805), (5, 3981444), (6, 3317870), (10, 1990722), (12, 1658935), (15, 1327148), (20, 995361), (30, 663574), (60, 331787), (257, 77460), (514, 38730), (771, 25820), (1028, 19365), (1285, 15492), (1291, 15420), (1542, 12910), (2570, 7746), (2582, 7710), (3084, 6455), (3855, 5164), (3873, 5140)]