20819390

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{41}}^1\times {\mathrm{103}}^1$

素因数の和:197

約数の個数: 64

約数和(自身を含む): 42456960

約数和(自身を除く): 21637570

約数列:

[1, 2, 5, 10, 17, 29, 34, 41, 58, 82, 85, 103, 145, 170, 205, 206, 290, 410, 493, 515, 697, 986, 1030, 1189, 1394, 1751, 2378, 2465, 2987, 3485, 3502, 4223, 4930, 5945, 5974, 6970, 8446, 8755, 11890, 14935, 17510, 20213, 21115, 29870, 40426, 42230, 50779, 71791, 101065, 101558, 122467, 143582, 202130, 244934, 253895, 358955, 507790, 612335, 717910, 1224670, 2081939, 4163878, 10409695, 20819390]

約数ペア:

[(1, 20819390), (2, 10409695), (5, 4163878), (10, 2081939), (17, 1224670), (29, 717910), (34, 612335), (41, 507790), (58, 358955), (82, 253895), (85, 244934), (103, 202130), (145, 143582), (170, 122467), (205, 101558), (206, 101065), (290, 71791), (410, 50779), (493, 42230), (515, 40426), (697, 29870), (986, 21115), (1030, 20213), (1189, 17510), (1394, 14935), (1751, 11890), (2378, 8755), (2465, 8446), (2987, 6970), (3485, 5974), (3502, 5945), (4223, 4930)]