21820890

素因数分解:

$2^1\times 3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{7993}}^1$

素因数の和:8023

約数の個数: 64

約数和(自身を含む): 64463616

約数和(自身を除く): 42642726

約数列:

[1, 2, 3, 5, 6, 7, 10, 13, 14, 15, 21, 26, 30, 35, 39, 42, 65, 70, 78, 91, 105, 130, 182, 195, 210, 273, 390, 455, 546, 910, 1365, 2730, 7993, 15986, 23979, 39965, 47958, 55951, 79930, 103909, 111902, 119895, 167853, 207818, 239790, 279755, 311727, 335706, 519545, 559510, 623454, 727363, 839265, 1039090, 1454726, 1558635, 1678530, 2182089, 3117270, 3636815, 4364178, 7273630, 10910445, 21820890]

約数ペア:

[(1, 21820890), (2, 10910445), (3, 7273630), (5, 4364178), (6, 3636815), (7, 3117270), (10, 2182089), (13, 1678530), (14, 1558635), (15, 1454726), (21, 1039090), (26, 839265), (30, 727363), (35, 623454), (39, 559510), (42, 519545), (65, 335706), (70, 311727), (78, 279755), (91, 239790), (105, 207818), (130, 167853), (182, 119895), (195, 111902), (210, 103909), (273, 79930), (390, 55951), (455, 47958), (546, 39965), (910, 23979), (1365, 15986), (2730, 7993)]