178995860

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^2\times {\mathrm{67}}^1\times {\mathrm{139}}^1$

素因数の和:277

約数の個数: 72

約数和(自身を含む): 397041120

約数和(自身を除く): 218045260

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 67, 124, 134, 139, 155, 268, 278, 310, 335, 556, 620, 670, 695, 961, 1340, 1390, 1922, 2077, 2780, 3844, 4154, 4309, 4805, 8308, 8618, 9313, 9610, 10385, 17236, 18626, 19220, 20770, 21545, 37252, 41540, 43090, 46565, 64387, 86180, 93130, 128774, 133579, 186260, 257548, 267158, 288703, 321935, 534316, 577406, 643870, 667895, 1154812, 1287740, 1335790, 1443515, 2671580, 2887030, 5774060, 8949793, 17899586, 35799172, 44748965, 89497930, 178995860]

約数ペア:

[(1, 178995860), (2, 89497930), (4, 44748965), (5, 35799172), (10, 17899586), (20, 8949793), (31, 5774060), (62, 2887030), (67, 2671580), (124, 1443515), (134, 1335790), (139, 1287740), (155, 1154812), (268, 667895), (278, 643870), (310, 577406), (335, 534316), (556, 321935), (620, 288703), (670, 267158), (695, 257548), (961, 186260), (1340, 133579), (1390, 128774), (1922, 93130), (2077, 86180), (2780, 64387), (3844, 46565), (4154, 43090), (4309, 41540), (4805, 37252), (8308, 21545), (8618, 20770), (9313, 19220), (9610, 18626), (10385, 17236)]