19695820

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{911}}^1$

素因数の和:990

約数の個数: 48

約数和(自身を含む): 44126208

約数和(自身を除く): 24430388

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 47, 92, 94, 115, 188, 230, 235, 460, 470, 911, 940, 1081, 1822, 2162, 3644, 4324, 4555, 5405, 9110, 10810, 18220, 20953, 21620, 41906, 42817, 83812, 85634, 104765, 171268, 209530, 214085, 419060, 428170, 856340, 984791, 1969582, 3939164, 4923955, 9847910, 19695820]

約数ペア:

[(1, 19695820), (2, 9847910), (4, 4923955), (5, 3939164), (10, 1969582), (20, 984791), (23, 856340), (46, 428170), (47, 419060), (92, 214085), (94, 209530), (115, 171268), (188, 104765), (230, 85634), (235, 83812), (460, 42817), (470, 41906), (911, 21620), (940, 20953), (1081, 18220), (1822, 10810), (2162, 9110), (3644, 5405), (4324, 4555)]