21756140

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{8179}}^1$

素因数の和:8214

約数の個数: 48

約数和(自身を含む): 54969600

約数和(自身を除く): 33213460

約数列:

[1, 2, 4, 5, 7, 10, 14, 19, 20, 28, 35, 38, 70, 76, 95, 133, 140, 190, 266, 380, 532, 665, 1330, 2660, 8179, 16358, 32716, 40895, 57253, 81790, 114506, 155401, 163580, 229012, 286265, 310802, 572530, 621604, 777005, 1087807, 1145060, 1554010, 2175614, 3108020, 4351228, 5439035, 10878070, 21756140]

約数ペア:

[(1, 21756140), (2, 10878070), (4, 5439035), (5, 4351228), (7, 3108020), (10, 2175614), (14, 1554010), (19, 1145060), (20, 1087807), (28, 777005), (35, 621604), (38, 572530), (70, 310802), (76, 286265), (95, 229012), (133, 163580), (140, 155401), (190, 114506), (266, 81790), (380, 57253), (532, 40895), (665, 32716), (1330, 16358), (2660, 8179)]