21566140

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^2\times {\mathrm{29}}^1\times {\mathrm{103}}^1$

素因数の和:179

約数の個数: 72

約数和(自身を含む): 49926240

約数和(自身を除く): 28360100

約数列:

[1, 2, 4, 5, 10, 19, 20, 29, 38, 58, 76, 95, 103, 116, 145, 190, 206, 290, 361, 380, 412, 515, 551, 580, 722, 1030, 1102, 1444, 1805, 1957, 2060, 2204, 2755, 2987, 3610, 3914, 5510, 5974, 7220, 7828, 9785, 10469, 11020, 11948, 14935, 19570, 20938, 29870, 37183, 39140, 41876, 52345, 56753, 59740, 74366, 104690, 113506, 148732, 185915, 209380, 227012, 283765, 371830, 567530, 743660, 1078307, 1135060, 2156614, 4313228, 5391535, 10783070, 21566140]

約数ペア:

[(1, 21566140), (2, 10783070), (4, 5391535), (5, 4313228), (10, 2156614), (19, 1135060), (20, 1078307), (29, 743660), (38, 567530), (58, 371830), (76, 283765), (95, 227012), (103, 209380), (116, 185915), (145, 148732), (190, 113506), (206, 104690), (290, 74366), (361, 59740), (380, 56753), (412, 52345), (515, 41876), (551, 39140), (580, 37183), (722, 29870), (1030, 20938), (1102, 19570), (1444, 14935), (1805, 11948), (1957, 11020), (2060, 10469), (2204, 9785), (2755, 7828), (2987, 7220), (3610, 5974), (3914, 5510)]