81202640

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{137}}^1\times {\mathrm{239}}^1$

素因数の和:420

約数の個数: 80

約数和(自身を含む): 197130240

約数和(自身を除く): 115927600

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 137, 155, 239, 248, 274, 310, 478, 496, 548, 620, 685, 956, 1096, 1195, 1240, 1370, 1912, 2192, 2390, 2480, 2740, 3824, 4247, 4780, 5480, 7409, 8494, 9560, 10960, 14818, 16988, 19120, 21235, 29636, 32743, 33976, 37045, 42470, 59272, 65486, 67952, 74090, 84940, 118544, 130972, 148180, 163715, 169880, 261944, 296360, 327430, 339760, 523888, 592720, 654860, 1015033, 1309720, 2030066, 2619440, 4060132, 5075165, 8120264, 10150330, 16240528, 20300660, 40601320, 81202640]

約数ペア:

[(1, 81202640), (2, 40601320), (4, 20300660), (5, 16240528), (8, 10150330), (10, 8120264), (16, 5075165), (20, 4060132), (31, 2619440), (40, 2030066), (62, 1309720), (80, 1015033), (124, 654860), (137, 592720), (155, 523888), (239, 339760), (248, 327430), (274, 296360), (310, 261944), (478, 169880), (496, 163715), (548, 148180), (620, 130972), (685, 118544), (956, 84940), (1096, 74090), (1195, 67952), (1240, 65486), (1370, 59272), (1912, 42470), (2192, 37045), (2390, 33976), (2480, 32743), (2740, 29636), (3824, 21235), (4247, 19120), (4780, 16988), (5480, 14818), (7409, 10960), (8494, 9560)]