20213308745

素因数分解:

$5^1\times 7^2\times {\mathrm{19}}^2\times {\mathrm{449}}^1\times {\mathrm{509}}^1$

素因数の和:1015

約数の個数: 72

約数和(自身を含む): 29904309000

約数和(自身を除く): 9691000255

約数列:

[1, 5, 7, 19, 35, 49, 95, 133, 245, 361, 449, 509, 665, 931, 1805, 2245, 2527, 2545, 3143, 3563, 4655, 8531, 9671, 12635, 15715, 17689, 17815, 22001, 24941, 42655, 48355, 59717, 67697, 88445, 110005, 124705, 162089, 183749, 228541, 298585, 338485, 418019, 473879, 810445, 918745, 1134623, 1142705, 1286243, 1599787, 2090095, 2369395, 4342279, 5673115, 6431215, 7942361, 7998935, 9003701, 11198509, 21711395, 30395953, 39711805, 45018505, 55992545, 82503301, 151979765, 212771671, 412516505, 577523107, 1063858355, 2887615535, 4042661749, 20213308745]

約数ペア:

[(1, 20213308745), (5, 4042661749), (7, 2887615535), (19, 1063858355), (35, 577523107), (49, 412516505), (95, 212771671), (133, 151979765), (245, 82503301), (361, 55992545), (449, 45018505), (509, 39711805), (665, 30395953), (931, 21711395), (1805, 11198509), (2245, 9003701), (2527, 7998935), (2545, 7942361), (3143, 6431215), (3563, 5673115), (4655, 4342279), (8531, 2369395), (9671, 2090095), (12635, 1599787), (15715, 1286243), (17689, 1142705), (17815, 1134623), (22001, 918745), (24941, 810445), (42655, 473879), (48355, 418019), (59717, 338485), (67697, 298585), (88445, 228541), (110005, 183749), (124705, 162089)]