21941428

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{67}}^1\times {\mathrm{139}}^1$

素因数の和:260

約数の個数: 48

約数和(自身を含む): 42649600

約数和(自身を除く): 20708172

約数列:

[1, 2, 4, 19, 31, 38, 62, 67, 76, 124, 134, 139, 268, 278, 556, 589, 1178, 1273, 2077, 2356, 2546, 2641, 4154, 4309, 5092, 5282, 8308, 8618, 9313, 10564, 17236, 18626, 37252, 39463, 78926, 81871, 157852, 163742, 176947, 288703, 327484, 353894, 577406, 707788, 1154812, 5485357, 10970714, 21941428]

約数ペア:

[(1, 21941428), (2, 10970714), (4, 5485357), (19, 1154812), (31, 707788), (38, 577406), (62, 353894), (67, 327484), (76, 288703), (124, 176947), (134, 163742), (139, 157852), (268, 81871), (278, 78926), (556, 39463), (589, 37252), (1178, 18626), (1273, 17236), (2077, 10564), (2356, 9313), (2546, 8618), (2641, 8308), (4154, 5282), (4309, 5092)]