8440940

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{97}}^1\times {\mathrm{229}}^1$

素因数の和:354

約数の個数: 48

約数和(自身を含む): 18933600

約数和(自身を除く): 10492660

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 97, 190, 194, 229, 380, 388, 458, 485, 916, 970, 1145, 1843, 1940, 2290, 3686, 4351, 4580, 7372, 8702, 9215, 17404, 18430, 21755, 22213, 36860, 43510, 44426, 87020, 88852, 111065, 222130, 422047, 444260, 844094, 1688188, 2110235, 4220470, 8440940]

約数ペア:

[(1, 8440940), (2, 4220470), (4, 2110235), (5, 1688188), (10, 844094), (19, 444260), (20, 422047), (38, 222130), (76, 111065), (95, 88852), (97, 87020), (190, 44426), (194, 43510), (229, 36860), (380, 22213), (388, 21755), (458, 18430), (485, 17404), (916, 9215), (970, 8702), (1145, 7372), (1843, 4580), (1940, 4351), (2290, 3686)]