78816940

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{211}}^1\times {\mathrm{983}}^1$

素因数の和:1222

約数の個数: 48

約数和(自身を含む): 175230720

約数和(自身を除く): 96413780

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 211, 380, 422, 844, 983, 1055, 1966, 2110, 3932, 4009, 4220, 4915, 8018, 9830, 16036, 18677, 19660, 20045, 37354, 40090, 74708, 80180, 93385, 186770, 207413, 373540, 414826, 829652, 1037065, 2074130, 3940847, 4148260, 7881694, 15763388, 19704235, 39408470, 78816940]

約数ペア:

[(1, 78816940), (2, 39408470), (4, 19704235), (5, 15763388), (10, 7881694), (19, 4148260), (20, 3940847), (38, 2074130), (76, 1037065), (95, 829652), (190, 414826), (211, 373540), (380, 207413), (422, 186770), (844, 93385), (983, 80180), (1055, 74708), (1966, 40090), (2110, 37354), (3932, 20045), (4009, 19660), (4220, 18677), (4915, 16036), (8018, 9830)]