19952680

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{137}}^1\times {\mathrm{331}}^1$

素因数の和:490

約数の個数: 64

約数和(自身を含む): 49481280

約数和(自身を除く): 29528600

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 137, 220, 274, 331, 440, 548, 662, 685, 1096, 1324, 1370, 1507, 1655, 2648, 2740, 3014, 3310, 3641, 5480, 6028, 6620, 7282, 7535, 12056, 13240, 14564, 15070, 18205, 29128, 30140, 36410, 45347, 60280, 72820, 90694, 145640, 181388, 226735, 362776, 453470, 498817, 906940, 997634, 1813880, 1995268, 2494085, 3990536, 4988170, 9976340, 19952680]

約数ペア:

[(1, 19952680), (2, 9976340), (4, 4988170), (5, 3990536), (8, 2494085), (10, 1995268), (11, 1813880), (20, 997634), (22, 906940), (40, 498817), (44, 453470), (55, 362776), (88, 226735), (110, 181388), (137, 145640), (220, 90694), (274, 72820), (331, 60280), (440, 45347), (548, 36410), (662, 30140), (685, 29128), (1096, 18205), (1324, 15070), (1370, 14564), (1507, 13240), (1655, 12056), (2648, 7535), (2740, 7282), (3014, 6620), (3310, 6028), (3641, 5480)]