19805890

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{131}}^1\times {\mathrm{1163}}^1$

素因数の和:1314

約数の個数: 32

約数和(自身を含む): 38719296

約数和(自身を除く): 18913406

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 131, 262, 655, 1163, 1310, 1703, 2326, 3406, 5815, 8515, 11630, 15119, 17030, 30238, 75595, 151190, 152353, 304706, 761765, 1523530, 1980589, 3961178, 9902945, 19805890]

約数ペア:

[(1, 19805890), (2, 9902945), (5, 3961178), (10, 1980589), (13, 1523530), (26, 761765), (65, 304706), (130, 152353), (131, 151190), (262, 75595), (655, 30238), (1163, 17030), (1310, 15119), (1703, 11630), (2326, 8515), (3406, 5815)]