2891990

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{491}}^1$

素因数の和:548

約数の個数: 32

約数和(自身を含む): 5667840

約数和(自身を除く): 2775850

約数列:

[1, 2, 5, 10, 19, 31, 38, 62, 95, 155, 190, 310, 491, 589, 982, 1178, 2455, 2945, 4910, 5890, 9329, 15221, 18658, 30442, 46645, 76105, 93290, 152210, 289199, 578398, 1445995, 2891990]

約数ペア:

[(1, 2891990), (2, 1445995), (5, 578398), (10, 289199), (19, 152210), (31, 93290), (38, 76105), (62, 46645), (95, 30442), (155, 18658), (190, 15221), (310, 9329), (491, 5890), (589, 4910), (982, 2945), (1178, 2455)]