81554560

素因数分解:

$2^7\times 5^1\times {\mathrm{61}}^1\times {\mathrm{2089}}^1$

素因数の和:2169

約数の個数: 64

約数和(自身を含む): 198257400

約数和(自身を除く): 116702840

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 61, 64, 80, 122, 128, 160, 244, 305, 320, 488, 610, 640, 976, 1220, 1952, 2089, 2440, 3904, 4178, 4880, 7808, 8356, 9760, 10445, 16712, 19520, 20890, 33424, 39040, 41780, 66848, 83560, 127429, 133696, 167120, 254858, 267392, 334240, 509716, 637145, 668480, 1019432, 1274290, 1336960, 2038864, 2548580, 4077728, 5097160, 8155456, 10194320, 16310912, 20388640, 40777280, 81554560]

約数ペア:

[(1, 81554560), (2, 40777280), (4, 20388640), (5, 16310912), (8, 10194320), (10, 8155456), (16, 5097160), (20, 4077728), (32, 2548580), (40, 2038864), (61, 1336960), (64, 1274290), (80, 1019432), (122, 668480), (128, 637145), (160, 509716), (244, 334240), (305, 267392), (320, 254858), (488, 167120), (610, 133696), (640, 127429), (976, 83560), (1220, 66848), (1952, 41780), (2089, 39040), (2440, 33424), (3904, 20890), (4178, 19520), (4880, 16712), (7808, 10445), (8356, 9760)]