21865760

素因数分解:

$2^5\times 5^1\times 7^2\times {\mathrm{2789}}^1$

素因数の和:2818

約数の個数: 72

約数和(自身を含む): 60113340

約数和(自身を除く): 38247580

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 49, 56, 70, 80, 98, 112, 140, 160, 196, 224, 245, 280, 392, 490, 560, 784, 980, 1120, 1568, 1960, 2789, 3920, 5578, 7840, 11156, 13945, 19523, 22312, 27890, 39046, 44624, 55780, 78092, 89248, 97615, 111560, 136661, 156184, 195230, 223120, 273322, 312368, 390460, 446240, 546644, 624736, 683305, 780920, 1093288, 1366610, 1561840, 2186576, 2733220, 3123680, 4373152, 5466440, 10932880, 21865760]

約数ペア:

[(1, 21865760), (2, 10932880), (4, 5466440), (5, 4373152), (7, 3123680), (8, 2733220), (10, 2186576), (14, 1561840), (16, 1366610), (20, 1093288), (28, 780920), (32, 683305), (35, 624736), (40, 546644), (49, 446240), (56, 390460), (70, 312368), (80, 273322), (98, 223120), (112, 195230), (140, 156184), (160, 136661), (196, 111560), (224, 97615), (245, 89248), (280, 78092), (392, 55780), (490, 44624), (560, 39046), (784, 27890), (980, 22312), (1120, 19523), (1568, 13945), (1960, 11156), (2789, 7840), (3920, 5578)]