20178970

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{79}}^1\times {\mathrm{89}}^1$

素因数の和:223

約数の個数: 64

約数和(自身を含む): 43545600

約数和(自身を除く): 23366630

約数列:

[1, 2, 5, 7, 10, 14, 35, 41, 70, 79, 82, 89, 158, 178, 205, 287, 395, 410, 445, 553, 574, 623, 790, 890, 1106, 1246, 1435, 2765, 2870, 3115, 3239, 3649, 5530, 6230, 6478, 7031, 7298, 14062, 16195, 18245, 22673, 25543, 32390, 35155, 36490, 45346, 49217, 51086, 70310, 98434, 113365, 127715, 226730, 246085, 255430, 288271, 492170, 576542, 1441355, 2017897, 2882710, 4035794, 10089485, 20178970]

約数ペア:

[(1, 20178970), (2, 10089485), (5, 4035794), (7, 2882710), (10, 2017897), (14, 1441355), (35, 576542), (41, 492170), (70, 288271), (79, 255430), (82, 246085), (89, 226730), (158, 127715), (178, 113365), (205, 98434), (287, 70310), (395, 51086), (410, 49217), (445, 45346), (553, 36490), (574, 35155), (623, 32390), (790, 25543), (890, 22673), (1106, 18245), (1246, 16195), (1435, 14062), (2765, 7298), (2870, 7031), (3115, 6478), (3239, 6230), (3649, 5530)]