20680400

素因数分解:

$2^4\times 5^2\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{97}}^1$

素因数の和:169

約数の個数: 120

約数和(自身を含む): 55376664

約数和(自身を除く): 34696264

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 25, 26, 40, 41, 50, 52, 65, 80, 82, 97, 100, 104, 130, 164, 194, 200, 205, 208, 260, 325, 328, 388, 400, 410, 485, 520, 533, 650, 656, 776, 820, 970, 1025, 1040, 1066, 1261, 1300, 1552, 1640, 1940, 2050, 2132, 2425, 2522, 2600, 2665, 3280, 3880, 3977, 4100, 4264, 4850, 5044, 5200, 5330, 6305, 7760, 7954, 8200, 8528, 9700, 10088, 10660, 12610, 13325, 15908, 16400, 19400, 19885, 20176, 21320, 25220, 26650, 31525, 31816, 38800, 39770, 42640, 50440, 51701, 53300, 63050, 63632, 79540, 99425, 100880, 103402, 106600, 126100, 159080, 198850, 206804, 213200, 252200, 258505, 318160, 397700, 413608, 504400, 517010, 795400, 827216, 1034020, 1292525, 1590800, 2068040, 2585050, 4136080, 5170100, 10340200, 20680400]

約数ペア:

[(1, 20680400), (2, 10340200), (4, 5170100), (5, 4136080), (8, 2585050), (10, 2068040), (13, 1590800), (16, 1292525), (20, 1034020), (25, 827216), (26, 795400), (40, 517010), (41, 504400), (50, 413608), (52, 397700), (65, 318160), (80, 258505), (82, 252200), (97, 213200), (100, 206804), (104, 198850), (130, 159080), (164, 126100), (194, 106600), (200, 103402), (205, 100880), (208, 99425), (260, 79540), (325, 63632), (328, 63050), (388, 53300), (400, 51701), (410, 50440), (485, 42640), (520, 39770), (533, 38800), (650, 31816), (656, 31525), (776, 26650), (820, 25220), (970, 21320), (1025, 20176), (1040, 19885), (1066, 19400), (1261, 16400), (1300, 15908), (1552, 13325), (1640, 12610), (1940, 10660), (2050, 10088), (2132, 9700), (2425, 8528), (2522, 8200), (2600, 7954), (2665, 7760), (3280, 6305), (3880, 5330), (3977, 5200), (4100, 5044), (4264, 4850)]