19901930

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^2\times {\mathrm{37}}^1\times {\mathrm{149}}^1$

素因数の和:231

約数の個数: 48

約数和(自身を含む): 39090600

約数和(自身を除く): 19188670

約数列:

[1, 2, 5, 10, 19, 37, 38, 74, 95, 149, 185, 190, 298, 361, 370, 703, 722, 745, 1406, 1490, 1805, 2831, 3515, 3610, 5513, 5662, 7030, 11026, 13357, 14155, 26714, 27565, 28310, 53789, 55130, 66785, 104747, 107578, 133570, 209494, 268945, 523735, 537890, 1047470, 1990193, 3980386, 9950965, 19901930]

約数ペア:

[(1, 19901930), (2, 9950965), (5, 3980386), (10, 1990193), (19, 1047470), (37, 537890), (38, 523735), (74, 268945), (95, 209494), (149, 133570), (185, 107578), (190, 104747), (298, 66785), (361, 55130), (370, 53789), (703, 28310), (722, 27565), (745, 26714), (1406, 14155), (1490, 13357), (1805, 11026), (2831, 7030), (3515, 5662), (3610, 5513)]