20931690

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{191}}^1\times {\mathrm{281}}^1$

素因数の和:495

約数の個数: 64

約数和(自身を含む): 54577152

約数和(自身を除く): 33645462

約数列:

[1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, 191, 195, 281, 382, 390, 562, 573, 843, 955, 1146, 1405, 1686, 1910, 2483, 2810, 2865, 3653, 4215, 4966, 5730, 7306, 7449, 8430, 10959, 12415, 14898, 18265, 21918, 24830, 36530, 37245, 53671, 54795, 74490, 107342, 109590, 161013, 268355, 322026, 536710, 697723, 805065, 1395446, 1610130, 2093169, 3488615, 4186338, 6977230, 10465845, 20931690]

約数ペア:

[(1, 20931690), (2, 10465845), (3, 6977230), (5, 4186338), (6, 3488615), (10, 2093169), (13, 1610130), (15, 1395446), (26, 805065), (30, 697723), (39, 536710), (65, 322026), (78, 268355), (130, 161013), (191, 109590), (195, 107342), (281, 74490), (382, 54795), (390, 53671), (562, 37245), (573, 36530), (843, 24830), (955, 21918), (1146, 18265), (1405, 14898), (1686, 12415), (1910, 10959), (2483, 8430), (2810, 7449), (2865, 7306), (3653, 5730), (4215, 4966)]