20538420

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{79}}^1\times {\mathrm{619}}^1$

素因数の和:717

約数の個数: 96

約数和(自身を含む): 66662400

約数和(自身を除く): 46123980

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 79, 84, 105, 140, 158, 210, 237, 316, 395, 420, 474, 553, 619, 790, 948, 1106, 1185, 1238, 1580, 1659, 1857, 2212, 2370, 2476, 2765, 3095, 3318, 3714, 4333, 4740, 5530, 6190, 6636, 7428, 8295, 8666, 9285, 11060, 12380, 12999, 16590, 17332, 18570, 21665, 25998, 33180, 37140, 43330, 48901, 51996, 64995, 86660, 97802, 129990, 146703, 195604, 244505, 259980, 293406, 342307, 489010, 586812, 684614, 733515, 978020, 1026921, 1369228, 1467030, 1711535, 2053842, 2934060, 3423070, 4107684, 5134605, 6846140, 10269210, 20538420]

約数ペア:

[(1, 20538420), (2, 10269210), (3, 6846140), (4, 5134605), (5, 4107684), (6, 3423070), (7, 2934060), (10, 2053842), (12, 1711535), (14, 1467030), (15, 1369228), (20, 1026921), (21, 978020), (28, 733515), (30, 684614), (35, 586812), (42, 489010), (60, 342307), (70, 293406), (79, 259980), (84, 244505), (105, 195604), (140, 146703), (158, 129990), (210, 97802), (237, 86660), (316, 64995), (395, 51996), (420, 48901), (474, 43330), (553, 37140), (619, 33180), (790, 25998), (948, 21665), (1106, 18570), (1185, 17332), (1238, 16590), (1580, 12999), (1659, 12380), (1857, 11060), (2212, 9285), (2370, 8666), (2476, 8295), (2765, 7428), (3095, 6636), (3318, 6190), (3714, 5530), (4333, 4740)]