20691210

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{1399}}^1$

素因数の和:1455

約数の個数: 64

約数和(自身を含む): 54432000

約数和(自身を除く): 33740790

約数列:

[1, 2, 3, 5, 6, 10, 15, 17, 29, 30, 34, 51, 58, 85, 87, 102, 145, 170, 174, 255, 290, 435, 493, 510, 870, 986, 1399, 1479, 2465, 2798, 2958, 4197, 4930, 6995, 7395, 8394, 13990, 14790, 20985, 23783, 40571, 41970, 47566, 71349, 81142, 118915, 121713, 142698, 202855, 237830, 243426, 356745, 405710, 608565, 689707, 713490, 1217130, 1379414, 2069121, 3448535, 4138242, 6897070, 10345605, 20691210]

約数ペア:

[(1, 20691210), (2, 10345605), (3, 6897070), (5, 4138242), (6, 3448535), (10, 2069121), (15, 1379414), (17, 1217130), (29, 713490), (30, 689707), (34, 608565), (51, 405710), (58, 356745), (85, 243426), (87, 237830), (102, 202855), (145, 142698), (170, 121713), (174, 118915), (255, 81142), (290, 71349), (435, 47566), (493, 41970), (510, 40571), (870, 23783), (986, 20985), (1399, 14790), (1479, 13990), (2465, 8394), (2798, 7395), (2958, 6995), (4197, 4930)]