21096940

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{83}}^1\times {\mathrm{179}}^1$

素因数の和:342

約数の個数: 48

約数和(自身を含む): 45722880

約数和(自身を除く): 24625940

約数列:

[1, 2, 4, 5, 10, 20, 71, 83, 142, 166, 179, 284, 332, 355, 358, 415, 710, 716, 830, 895, 1420, 1660, 1790, 3580, 5893, 11786, 12709, 14857, 23572, 25418, 29465, 29714, 50836, 58930, 59428, 63545, 74285, 117860, 127090, 148570, 254180, 297140, 1054847, 2109694, 4219388, 5274235, 10548470, 21096940]

約数ペア:

[(1, 21096940), (2, 10548470), (4, 5274235), (5, 4219388), (10, 2109694), (20, 1054847), (71, 297140), (83, 254180), (142, 148570), (166, 127090), (179, 117860), (284, 74285), (332, 63545), (355, 59428), (358, 58930), (415, 50836), (710, 29714), (716, 29465), (830, 25418), (895, 23572), (1420, 14857), (1660, 12709), (1790, 11786), (3580, 5893)]