20554105

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{89}}^1$

素因数の和:154

約数の個数: 64

約数和(自身を含む): 32659200

約数和(自身を除く): 12105095

約数列:

[1, 5, 11, 13, 17, 19, 55, 65, 85, 89, 95, 143, 187, 209, 221, 247, 323, 445, 715, 935, 979, 1045, 1105, 1157, 1235, 1513, 1615, 1691, 2431, 2717, 3553, 4199, 4895, 5785, 7565, 8455, 12155, 12727, 13585, 16643, 17765, 18601, 19669, 20995, 21983, 28747, 46189, 63635, 83215, 93005, 98345, 109915, 143735, 216359, 230945, 241813, 316217, 373711, 1081795, 1209065, 1581085, 1868555, 4110821, 20554105]

約数ペア:

[(1, 20554105), (5, 4110821), (11, 1868555), (13, 1581085), (17, 1209065), (19, 1081795), (55, 373711), (65, 316217), (85, 241813), (89, 230945), (95, 216359), (143, 143735), (187, 109915), (209, 98345), (221, 93005), (247, 83215), (323, 63635), (445, 46189), (715, 28747), (935, 21983), (979, 20995), (1045, 19669), (1105, 18601), (1157, 17765), (1235, 16643), (1513, 13585), (1615, 12727), (1691, 12155), (2431, 8455), (2717, 7565), (3553, 5785), (4199, 4895)]