2778940

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{103}}^1$

素因数の和:202

約数の個数: 48

約数和(自身を含む): 6289920

約数和(自身を除く): 3510980

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 71, 76, 95, 103, 142, 190, 206, 284, 355, 380, 412, 515, 710, 1030, 1349, 1420, 1957, 2060, 2698, 3914, 5396, 6745, 7313, 7828, 9785, 13490, 14626, 19570, 26980, 29252, 36565, 39140, 73130, 138947, 146260, 277894, 555788, 694735, 1389470, 2778940]

約数ペア:

[(1, 2778940), (2, 1389470), (4, 694735), (5, 555788), (10, 277894), (19, 146260), (20, 138947), (38, 73130), (71, 39140), (76, 36565), (95, 29252), (103, 26980), (142, 19570), (190, 14626), (206, 13490), (284, 9785), (355, 7828), (380, 7313), (412, 6745), (515, 5396), (710, 3914), (1030, 2698), (1349, 2060), (1420, 1957)]