278331380

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{509}}^1\times {\mathrm{1439}}^1$

素因数の和:1976

約数の個数: 48

約数和(自身を含む): 616896000

約数和(自身を除く): 338564620

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 380, 509, 1018, 1439, 2036, 2545, 2878, 5090, 5756, 7195, 9671, 10180, 14390, 19342, 27341, 28780, 38684, 48355, 54682, 96710, 109364, 136705, 193420, 273410, 546820, 732451, 1464902, 2929804, 3662255, 7324510, 13916569, 14649020, 27833138, 55666276, 69582845, 139165690, 278331380]

約数ペア:

[(1, 278331380), (2, 139165690), (4, 69582845), (5, 55666276), (10, 27833138), (19, 14649020), (20, 13916569), (38, 7324510), (76, 3662255), (95, 2929804), (190, 1464902), (380, 732451), (509, 546820), (1018, 273410), (1439, 193420), (2036, 136705), (2545, 109364), (2878, 96710), (5090, 54682), (5756, 48355), (7195, 38684), (9671, 28780), (10180, 27341), (14390, 19342)]