81061900

素因数分解:

$2^2\times 5^2\times {\mathrm{31}}^1\times {\mathrm{79}}^1\times {\mathrm{331}}^1$

素因数の和:455

約数の個数: 72

約数和(自身を含む): 184432640

約数和(自身を除く): 103370740

約数列:

[1, 2, 4, 5, 10, 20, 25, 31, 50, 62, 79, 100, 124, 155, 158, 310, 316, 331, 395, 620, 662, 775, 790, 1324, 1550, 1580, 1655, 1975, 2449, 3100, 3310, 3950, 4898, 6620, 7900, 8275, 9796, 10261, 12245, 16550, 20522, 24490, 26149, 33100, 41044, 48980, 51305, 52298, 61225, 102610, 104596, 122450, 130745, 205220, 244900, 256525, 261490, 513050, 522980, 653725, 810619, 1026100, 1307450, 1621238, 2614900, 3242476, 4053095, 8106190, 16212380, 20265475, 40530950, 81061900]

約数ペア:

[(1, 81061900), (2, 40530950), (4, 20265475), (5, 16212380), (10, 8106190), (20, 4053095), (25, 3242476), (31, 2614900), (50, 1621238), (62, 1307450), (79, 1026100), (100, 810619), (124, 653725), (155, 522980), (158, 513050), (310, 261490), (316, 256525), (331, 244900), (395, 205220), (620, 130745), (662, 122450), (775, 104596), (790, 102610), (1324, 61225), (1550, 52298), (1580, 51305), (1655, 48980), (1975, 41044), (2449, 33100), (3100, 26149), (3310, 24490), (3950, 20522), (4898, 16550), (6620, 12245), (7900, 10261), (8275, 9796)]