81903920

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{6359}}^1$

素因数の和:6402

約数の個数: 80

約数和(自身を含む): 227128320

約数和(自身を除く): 145224400

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 23, 28, 35, 40, 46, 56, 70, 80, 92, 112, 115, 140, 161, 184, 230, 280, 322, 368, 460, 560, 644, 805, 920, 1288, 1610, 1840, 2576, 3220, 6359, 6440, 12718, 12880, 25436, 31795, 44513, 50872, 63590, 89026, 101744, 127180, 146257, 178052, 222565, 254360, 292514, 356104, 445130, 508720, 585028, 712208, 731285, 890260, 1023799, 1170056, 1462570, 1780520, 2047598, 2340112, 2925140, 3561040, 4095196, 5118995, 5850280, 8190392, 10237990, 11700560, 16380784, 20475980, 40951960, 81903920]

約数ペア:

[(1, 81903920), (2, 40951960), (4, 20475980), (5, 16380784), (7, 11700560), (8, 10237990), (10, 8190392), (14, 5850280), (16, 5118995), (20, 4095196), (23, 3561040), (28, 2925140), (35, 2340112), (40, 2047598), (46, 1780520), (56, 1462570), (70, 1170056), (80, 1023799), (92, 890260), (112, 731285), (115, 712208), (140, 585028), (161, 508720), (184, 445130), (230, 356104), (280, 292514), (322, 254360), (368, 222565), (460, 178052), (560, 146257), (644, 127180), (805, 101744), (920, 89026), (1288, 63590), (1610, 50872), (1840, 44513), (2576, 31795), (3220, 25436), (6359, 12880), (6440, 12718)]