21963172

素因数分解:

$2^2\times 7^2\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{167}}^1$

素因数の和:257

約数の個数: 72

約数和(自身を含む): 49871808

約数和(自身を除く): 27908636

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 44, 49, 61, 77, 98, 122, 154, 167, 196, 244, 308, 334, 427, 539, 668, 671, 854, 1078, 1169, 1342, 1708, 1837, 2156, 2338, 2684, 2989, 3674, 4676, 4697, 5978, 7348, 8183, 9394, 10187, 11956, 12859, 16366, 18788, 20374, 25718, 32732, 32879, 40748, 51436, 65758, 71309, 90013, 112057, 131516, 142618, 180026, 224114, 285236, 360052, 448228, 499163, 784399, 998326, 1568798, 1996652, 3137596, 5490793, 10981586, 21963172]

約数ペア:

[(1, 21963172), (2, 10981586), (4, 5490793), (7, 3137596), (11, 1996652), (14, 1568798), (22, 998326), (28, 784399), (44, 499163), (49, 448228), (61, 360052), (77, 285236), (98, 224114), (122, 180026), (154, 142618), (167, 131516), (196, 112057), (244, 90013), (308, 71309), (334, 65758), (427, 51436), (539, 40748), (668, 32879), (671, 32732), (854, 25718), (1078, 20374), (1169, 18788), (1342, 16366), (1708, 12859), (1837, 11956), (2156, 10187), (2338, 9394), (2684, 8183), (2989, 7348), (3674, 5978), (4676, 4697)]