161955820

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{409}}^1\times {\mathrm{1523}}^1$

素因数の和:1954

約数の個数: 48

約数和(自身を含む): 367405920

約数和(自身を除く): 205450100

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 409, 818, 1523, 1636, 2045, 3046, 4090, 5317, 6092, 7615, 8180, 10634, 15230, 19799, 21268, 26585, 30460, 39598, 53170, 79196, 98995, 106340, 197990, 395980, 622907, 1245814, 2491628, 3114535, 6229070, 8097791, 12458140, 16195582, 32391164, 40488955, 80977910, 161955820]

約数ペア:

[(1, 161955820), (2, 80977910), (4, 40488955), (5, 32391164), (10, 16195582), (13, 12458140), (20, 8097791), (26, 6229070), (52, 3114535), (65, 2491628), (130, 1245814), (260, 622907), (409, 395980), (818, 197990), (1523, 106340), (1636, 98995), (2045, 79196), (3046, 53170), (4090, 39598), (5317, 30460), (6092, 26585), (7615, 21268), (8180, 19799), (10634, 15230)]