81265280

素因数分解:

$2^7\times 5^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{163}}^1$

素因数の和:242

約数の個数: 128

約数和(自身を含む): 210772800

約数和(自身を除く): 129507520

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 32, 38, 40, 41, 64, 76, 80, 82, 95, 128, 152, 160, 163, 164, 190, 205, 304, 320, 326, 328, 380, 410, 608, 640, 652, 656, 760, 779, 815, 820, 1216, 1304, 1312, 1520, 1558, 1630, 1640, 2432, 2608, 2624, 3040, 3097, 3116, 3260, 3280, 3895, 5216, 5248, 6080, 6194, 6232, 6520, 6560, 6683, 7790, 10432, 12160, 12388, 12464, 13040, 13120, 13366, 15485, 15580, 20864, 24776, 24928, 26080, 26240, 26732, 30970, 31160, 33415, 49552, 49856, 52160, 53464, 61940, 62320, 66830, 99104, 99712, 104320, 106928, 123880, 124640, 126977, 133660, 198208, 213856, 247760, 249280, 253954, 267320, 396416, 427712, 495520, 498560, 507908, 534640, 634885, 855424, 991040, 1015816, 1069280, 1269770, 1982080, 2031632, 2138560, 2539540, 4063264, 4277120, 5079080, 8126528, 10158160, 16253056, 20316320, 40632640, 81265280]

約数ペア:

[(1, 81265280), (2, 40632640), (4, 20316320), (5, 16253056), (8, 10158160), (10, 8126528), (16, 5079080), (19, 4277120), (20, 4063264), (32, 2539540), (38, 2138560), (40, 2031632), (41, 1982080), (64, 1269770), (76, 1069280), (80, 1015816), (82, 991040), (95, 855424), (128, 634885), (152, 534640), (160, 507908), (163, 498560), (164, 495520), (190, 427712), (205, 396416), (304, 267320), (320, 253954), (326, 249280), (328, 247760), (380, 213856), (410, 198208), (608, 133660), (640, 126977), (652, 124640), (656, 123880), (760, 106928), (779, 104320), (815, 99712), (820, 99104), (1216, 66830), (1304, 62320), (1312, 61940), (1520, 53464), (1558, 52160), (1630, 49856), (1640, 49552), (2432, 33415), (2608, 31160), (2624, 30970), (3040, 26732), (3097, 26240), (3116, 26080), (3260, 24928), (3280, 24776), (3895, 20864), (5216, 15580), (5248, 15485), (6080, 13366), (6194, 13120), (6232, 13040), (6520, 12464), (6560, 12388), (6683, 12160), (7790, 10432)]