81461120

素因数分解:

$2^7\times 5^1\times {\mathrm{13}}^1\times {\mathrm{9791}}^1$

素因数の和:9823

約数の個数: 64

約数和(自身を含む): 209744640

約数和(自身を除く): 128283520

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 104, 128, 130, 160, 208, 260, 320, 416, 520, 640, 832, 1040, 1664, 2080, 4160, 8320, 9791, 19582, 39164, 48955, 78328, 97910, 127283, 156656, 195820, 254566, 313312, 391640, 509132, 626624, 636415, 783280, 1018264, 1253248, 1272830, 1566560, 2036528, 2545660, 3133120, 4073056, 5091320, 6266240, 8146112, 10182640, 16292224, 20365280, 40730560, 81461120]

約数ペア:

[(1, 81461120), (2, 40730560), (4, 20365280), (5, 16292224), (8, 10182640), (10, 8146112), (13, 6266240), (16, 5091320), (20, 4073056), (26, 3133120), (32, 2545660), (40, 2036528), (52, 1566560), (64, 1272830), (65, 1253248), (80, 1018264), (104, 783280), (128, 636415), (130, 626624), (160, 509132), (208, 391640), (260, 313312), (320, 254566), (416, 195820), (520, 156656), (640, 127283), (832, 97910), (1040, 78328), (1664, 48955), (2080, 39164), (4160, 19582), (8320, 9791)]