19981530

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{53}}^1\times {\mathrm{59}}^1\times {\mathrm{71}}^1$

素因数の和:196

約数の個数: 96

約数和(自身を含む): 54587520

約数和(自身を除く): 34605990

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 53, 59, 71, 90, 106, 118, 142, 159, 177, 213, 265, 295, 318, 354, 355, 426, 477, 530, 531, 590, 639, 710, 795, 885, 954, 1062, 1065, 1278, 1590, 1770, 2130, 2385, 2655, 3127, 3195, 3763, 4189, 4770, 5310, 6254, 6390, 7526, 8378, 9381, 11289, 12567, 15635, 18762, 18815, 20945, 22578, 25134, 28143, 31270, 33867, 37630, 37701, 41890, 46905, 56286, 56445, 62835, 67734, 75402, 93810, 112890, 125670, 140715, 169335, 188505, 222017, 281430, 338670, 377010, 444034, 666051, 1110085, 1332102, 1998153, 2220170, 3330255, 3996306, 6660510, 9990765, 19981530]

約数ペア:

[(1, 19981530), (2, 9990765), (3, 6660510), (5, 3996306), (6, 3330255), (9, 2220170), (10, 1998153), (15, 1332102), (18, 1110085), (30, 666051), (45, 444034), (53, 377010), (59, 338670), (71, 281430), (90, 222017), (106, 188505), (118, 169335), (142, 140715), (159, 125670), (177, 112890), (213, 93810), (265, 75402), (295, 67734), (318, 62835), (354, 56445), (355, 56286), (426, 46905), (477, 41890), (530, 37701), (531, 37630), (590, 33867), (639, 31270), (710, 28143), (795, 25134), (885, 22578), (954, 20945), (1062, 18815), (1065, 18762), (1278, 15635), (1590, 12567), (1770, 11289), (2130, 9381), (2385, 8378), (2655, 7526), (3127, 6390), (3195, 6254), (3763, 5310), (4189, 4770)]