81798340

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{197}}^1\times {\mathrm{1597}}^1$

素因数の和:1816

約数の個数: 48

約数和(自身を含む): 186045552

約数和(自身を除く): 104247212

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 197, 260, 394, 788, 985, 1597, 1970, 2561, 3194, 3940, 5122, 6388, 7985, 10244, 12805, 15970, 20761, 25610, 31940, 41522, 51220, 83044, 103805, 207610, 314609, 415220, 629218, 1258436, 1573045, 3146090, 4089917, 6292180, 8179834, 16359668, 20449585, 40899170, 81798340]

約数ペア:

[(1, 81798340), (2, 40899170), (4, 20449585), (5, 16359668), (10, 8179834), (13, 6292180), (20, 4089917), (26, 3146090), (52, 1573045), (65, 1258436), (130, 629218), (197, 415220), (260, 314609), (394, 207610), (788, 103805), (985, 83044), (1597, 51220), (1970, 41522), (2561, 31940), (3194, 25610), (3940, 20761), (5122, 15970), (6388, 12805), (7985, 10244)]