261817910

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{67}}^1\times {\mathrm{131}}^1\times {\mathrm{157}}^1$

素因数の和:381

約数の個数: 64

約数和(自身を含む): 510554880

約数和(自身を除く): 248736970

約数列:

[1, 2, 5, 10, 19, 38, 67, 95, 131, 134, 157, 190, 262, 314, 335, 655, 670, 785, 1273, 1310, 1570, 2489, 2546, 2983, 4978, 5966, 6365, 8777, 10519, 12445, 12730, 14915, 17554, 20567, 21038, 24890, 29830, 41134, 43885, 52595, 87770, 102835, 105190, 166763, 199861, 205670, 333526, 390773, 399722, 781546, 833815, 999305, 1377989, 1667630, 1953865, 1998610, 2755978, 3907730, 6889945, 13779890, 26181791, 52363582, 130908955, 261817910]

約数ペア:

[(1, 261817910), (2, 130908955), (5, 52363582), (10, 26181791), (19, 13779890), (38, 6889945), (67, 3907730), (95, 2755978), (131, 1998610), (134, 1953865), (157, 1667630), (190, 1377989), (262, 999305), (314, 833815), (335, 781546), (655, 399722), (670, 390773), (785, 333526), (1273, 205670), (1310, 199861), (1570, 166763), (2489, 105190), (2546, 102835), (2983, 87770), (4978, 52595), (5966, 43885), (6365, 41134), (8777, 29830), (10519, 24890), (12445, 21038), (12730, 20567), (14915, 17554)]