20271825

素因数分解:

$3^2\times 5^2\times 7^1\times {\mathrm{61}}^1\times {\mathrm{211}}^1$

素因数の和:295

約数の個数: 72

約数和(自身を含む): 42376256

約数和(自身を除く): 22104431

約数列:

[1, 3, 5, 7, 9, 15, 21, 25, 35, 45, 61, 63, 75, 105, 175, 183, 211, 225, 305, 315, 427, 525, 549, 633, 915, 1055, 1281, 1477, 1525, 1575, 1899, 2135, 2745, 3165, 3843, 4431, 4575, 5275, 6405, 7385, 9495, 10675, 12871, 13293, 13725, 15825, 19215, 22155, 32025, 36925, 38613, 47475, 64355, 66465, 90097, 96075, 110775, 115839, 193065, 270291, 321775, 332325, 450485, 579195, 810873, 965325, 1351455, 2252425, 2895975, 4054365, 6757275, 20271825]

約数ペア:

[(1, 20271825), (3, 6757275), (5, 4054365), (7, 2895975), (9, 2252425), (15, 1351455), (21, 965325), (25, 810873), (35, 579195), (45, 450485), (61, 332325), (63, 321775), (75, 270291), (105, 193065), (175, 115839), (183, 110775), (211, 96075), (225, 90097), (305, 66465), (315, 64355), (427, 47475), (525, 38613), (549, 36925), (633, 32025), (915, 22155), (1055, 19215), (1281, 15825), (1477, 13725), (1525, 13293), (1575, 12871), (1899, 10675), (2135, 9495), (2745, 7385), (3165, 6405), (3843, 5275), (4431, 4575)]