20356480

素因数分解:

$2^7\times 5^1\times {\mathrm{17}}^1\times {\mathrm{1871}}^1$

素因数の和:1907

約数の個数: 64

約数和(自身を含む): 51554880

約数和(自身を除く): 31198400

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 64, 68, 80, 85, 128, 136, 160, 170, 272, 320, 340, 544, 640, 680, 1088, 1360, 1871, 2176, 2720, 3742, 5440, 7484, 9355, 10880, 14968, 18710, 29936, 31807, 37420, 59872, 63614, 74840, 119744, 127228, 149680, 159035, 239488, 254456, 299360, 318070, 508912, 598720, 636140, 1017824, 1197440, 1272280, 2035648, 2544560, 4071296, 5089120, 10178240, 20356480]

約数ペア:

[(1, 20356480), (2, 10178240), (4, 5089120), (5, 4071296), (8, 2544560), (10, 2035648), (16, 1272280), (17, 1197440), (20, 1017824), (32, 636140), (34, 598720), (40, 508912), (64, 318070), (68, 299360), (80, 254456), (85, 239488), (128, 159035), (136, 149680), (160, 127228), (170, 119744), (272, 74840), (320, 63614), (340, 59872), (544, 37420), (640, 31807), (680, 29936), (1088, 18710), (1360, 14968), (1871, 10880), (2176, 9355), (2720, 7484), (3742, 5440)]