991656778

素因数分解:

$2^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{59}}^1\times {\mathrm{179}}^1\times {\mathrm{353}}^1$

素因数の和:619

約数の個数: 64

約数和(自身を含む): 1835136000

約数和(自身を除く): 843479222

約数列:

[1, 2, 7, 14, 19, 38, 59, 118, 133, 179, 266, 353, 358, 413, 706, 826, 1121, 1253, 2242, 2471, 2506, 3401, 4942, 6707, 6802, 7847, 10561, 13414, 15694, 20827, 21122, 23807, 41654, 46949, 47614, 63187, 73927, 93898, 126374, 145789, 147854, 200659, 291578, 395713, 401318, 442309, 791426, 884618, 1200553, 1404613, 2401106, 2769991, 2809226, 3728033, 5539982, 7456066, 8403871, 16807742, 26096231, 52192462, 70832627, 141665254, 495828389, 991656778]

約数ペア:

[(1, 991656778), (2, 495828389), (7, 141665254), (14, 70832627), (19, 52192462), (38, 26096231), (59, 16807742), (118, 8403871), (133, 7456066), (179, 5539982), (266, 3728033), (353, 2809226), (358, 2769991), (413, 2401106), (706, 1404613), (826, 1200553), (1121, 884618), (1253, 791426), (2242, 442309), (2471, 401318), (2506, 395713), (3401, 291578), (4942, 200659), (6707, 147854), (6802, 145789), (7847, 126374), (10561, 93898), (13414, 73927), (15694, 63187), (20827, 47614), (21122, 46949), (23807, 41654)]