19937940

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{1777}}^1$

素因数の和:1817

約数の個数: 96

約数和(自身を含む): 64520064

約数和(自身を除く): 44582124

約数列:

[1, 2, 3, 4, 5, 6, 10, 11, 12, 15, 17, 20, 22, 30, 33, 34, 44, 51, 55, 60, 66, 68, 85, 102, 110, 132, 165, 170, 187, 204, 220, 255, 330, 340, 374, 510, 561, 660, 748, 935, 1020, 1122, 1777, 1870, 2244, 2805, 3554, 3740, 5331, 5610, 7108, 8885, 10662, 11220, 17770, 19547, 21324, 26655, 30209, 35540, 39094, 53310, 58641, 60418, 78188, 90627, 97735, 106620, 117282, 120836, 151045, 181254, 195470, 234564, 293205, 302090, 332299, 362508, 390940, 453135, 586410, 604180, 664598, 906270, 996897, 1172820, 1329196, 1661495, 1812540, 1993794, 3322990, 3987588, 4984485, 6645980, 9968970, 19937940]

約数ペア:

[(1, 19937940), (2, 9968970), (3, 6645980), (4, 4984485), (5, 3987588), (6, 3322990), (10, 1993794), (11, 1812540), (12, 1661495), (15, 1329196), (17, 1172820), (20, 996897), (22, 906270), (30, 664598), (33, 604180), (34, 586410), (44, 453135), (51, 390940), (55, 362508), (60, 332299), (66, 302090), (68, 293205), (85, 234564), (102, 195470), (110, 181254), (132, 151045), (165, 120836), (170, 117282), (187, 106620), (204, 97735), (220, 90627), (255, 78188), (330, 60418), (340, 58641), (374, 53310), (510, 39094), (561, 35540), (660, 30209), (748, 26655), (935, 21324), (1020, 19547), (1122, 17770), (1777, 11220), (1870, 10662), (2244, 8885), (2805, 7108), (3554, 5610), (3740, 5331)]