388521940

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{419}}^1\times {\mathrm{653}}^1$

素因数の和:1152

約数の個数: 48

約数和(自身を含む): 830632320

約数和(自身を除く): 442110380

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 419, 653, 710, 838, 1306, 1420, 1676, 2095, 2612, 3265, 4190, 6530, 8380, 13060, 29749, 46363, 59498, 92726, 118996, 148745, 185452, 231815, 273607, 297490, 463630, 547214, 594980, 927260, 1094428, 1368035, 2736070, 5472140, 19426097, 38852194, 77704388, 97130485, 194260970, 388521940]

約数ペア:

[(1, 388521940), (2, 194260970), (4, 97130485), (5, 77704388), (10, 38852194), (20, 19426097), (71, 5472140), (142, 2736070), (284, 1368035), (355, 1094428), (419, 927260), (653, 594980), (710, 547214), (838, 463630), (1306, 297490), (1420, 273607), (1676, 231815), (2095, 185452), (2612, 148745), (3265, 118996), (4190, 92726), (6530, 59498), (8380, 46363), (13060, 29749)]