81344320

素因数分解:

$2^6\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{787}}^1$

素因数の和:840

約数の個数: 112

約数和(自身を含む): 216164160

約数和(自身を除く): 134819840

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 19, 20, 32, 34, 38, 40, 64, 68, 76, 80, 85, 95, 136, 152, 160, 170, 190, 272, 304, 320, 323, 340, 380, 544, 608, 646, 680, 760, 787, 1088, 1216, 1292, 1360, 1520, 1574, 1615, 2584, 2720, 3040, 3148, 3230, 3935, 5168, 5440, 6080, 6296, 6460, 7870, 10336, 12592, 12920, 13379, 14953, 15740, 20672, 25184, 25840, 26758, 29906, 31480, 50368, 51680, 53516, 59812, 62960, 66895, 74765, 103360, 107032, 119624, 125920, 133790, 149530, 214064, 239248, 251840, 254201, 267580, 299060, 428128, 478496, 508402, 535160, 598120, 856256, 956992, 1016804, 1070320, 1196240, 1271005, 2033608, 2140640, 2392480, 2542010, 4067216, 4281280, 4784960, 5084020, 8134432, 10168040, 16268864, 20336080, 40672160, 81344320]

約数ペア:

[(1, 81344320), (2, 40672160), (4, 20336080), (5, 16268864), (8, 10168040), (10, 8134432), (16, 5084020), (17, 4784960), (19, 4281280), (20, 4067216), (32, 2542010), (34, 2392480), (38, 2140640), (40, 2033608), (64, 1271005), (68, 1196240), (76, 1070320), (80, 1016804), (85, 956992), (95, 856256), (136, 598120), (152, 535160), (160, 508402), (170, 478496), (190, 428128), (272, 299060), (304, 267580), (320, 254201), (323, 251840), (340, 239248), (380, 214064), (544, 149530), (608, 133790), (646, 125920), (680, 119624), (760, 107032), (787, 103360), (1088, 74765), (1216, 66895), (1292, 62960), (1360, 59812), (1520, 53516), (1574, 51680), (1615, 50368), (2584, 31480), (2720, 29906), (3040, 26758), (3148, 25840), (3230, 25184), (3935, 20672), (5168, 15740), (5440, 14953), (6080, 13379), (6296, 12920), (6460, 12592), (7870, 10336)]