20957440

素因数分解:

$2^8\times 5^1\times 7^1\times {\mathrm{2339}}^1$

素因数の和:2367

約数の個数: 72

約数和(自身を含む): 57395520

約数和(自身を除く): 36438080

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 64, 70, 80, 112, 128, 140, 160, 224, 256, 280, 320, 448, 560, 640, 896, 1120, 1280, 1792, 2240, 2339, 4480, 4678, 8960, 9356, 11695, 16373, 18712, 23390, 32746, 37424, 46780, 65492, 74848, 81865, 93560, 130984, 149696, 163730, 187120, 261968, 299392, 327460, 374240, 523936, 598784, 654920, 748480, 1047872, 1309840, 1496960, 2095744, 2619680, 2993920, 4191488, 5239360, 10478720, 20957440]

約数ペア:

[(1, 20957440), (2, 10478720), (4, 5239360), (5, 4191488), (7, 2993920), (8, 2619680), (10, 2095744), (14, 1496960), (16, 1309840), (20, 1047872), (28, 748480), (32, 654920), (35, 598784), (40, 523936), (56, 374240), (64, 327460), (70, 299392), (80, 261968), (112, 187120), (128, 163730), (140, 149696), (160, 130984), (224, 93560), (256, 81865), (280, 74848), (320, 65492), (448, 46780), (560, 37424), (640, 32746), (896, 23390), (1120, 18712), (1280, 16373), (1792, 11695), (2240, 9356), (2339, 8960), (4480, 4678)]