20871994

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{167}}^1$

素因数の和:235

約数の個数: 64

約数和(自身を含む): 40642560

約数和(自身を除く): 19770566

約数列:

[1, 2, 11, 13, 19, 22, 23, 26, 38, 46, 143, 167, 209, 247, 253, 286, 299, 334, 418, 437, 494, 506, 598, 874, 1837, 2171, 2717, 3173, 3289, 3674, 3841, 4342, 4807, 5434, 5681, 6346, 6578, 7682, 9614, 11362, 23881, 34903, 41249, 42251, 47762, 49933, 62491, 69806, 72979, 82498, 84502, 99866, 124982, 145958, 453739, 549263, 802769, 907478, 948727, 1098526, 1605538, 1897454, 10435997, 20871994]

約数ペア:

[(1, 20871994), (2, 10435997), (11, 1897454), (13, 1605538), (19, 1098526), (22, 948727), (23, 907478), (26, 802769), (38, 549263), (46, 453739), (143, 145958), (167, 124982), (209, 99866), (247, 84502), (253, 82498), (286, 72979), (299, 69806), (334, 62491), (418, 49933), (437, 47762), (494, 42251), (506, 41249), (598, 34903), (874, 23881), (1837, 11362), (2171, 9614), (2717, 7682), (3173, 6578), (3289, 6346), (3674, 5681), (3841, 5434), (4342, 4807)]