28278380

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{1783}}^1$

素因数の和:1866

約数の個数: 48

約数和(自身を含む): 65037504

約数和(自身を除く): 36759124

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 61, 65, 122, 130, 244, 260, 305, 610, 793, 1220, 1586, 1783, 3172, 3566, 3965, 7132, 7930, 8915, 15860, 17830, 23179, 35660, 46358, 92716, 108763, 115895, 217526, 231790, 435052, 463580, 543815, 1087630, 1413919, 2175260, 2827838, 5655676, 7069595, 14139190, 28278380]

約数ペア:

[(1, 28278380), (2, 14139190), (4, 7069595), (5, 5655676), (10, 2827838), (13, 2175260), (20, 1413919), (26, 1087630), (52, 543815), (61, 463580), (65, 435052), (122, 231790), (130, 217526), (244, 115895), (260, 108763), (305, 92716), (610, 46358), (793, 35660), (1220, 23179), (1586, 17830), (1783, 15860), (3172, 8915), (3566, 7930), (3965, 7132)]