20181279980

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{461}}^1\times {\mathrm{30829}}^1$

素因数の和:31370

約数の個数: 48

約数和(自身を含む): 43072223040

約数和(自身を除く): 22890943060

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 461, 710, 922, 1420, 1844, 2305, 4610, 9220, 30829, 32731, 61658, 65462, 123316, 130924, 154145, 163655, 308290, 327310, 616580, 654620, 2188859, 4377718, 8755436, 10944295, 14212169, 21888590, 28424338, 43777180, 56848676, 71060845, 142121690, 284243380, 1009063999, 2018127998, 4036255996, 5045319995, 10090639990, 20181279980]

約数ペア:

[(1, 20181279980), (2, 10090639990), (4, 5045319995), (5, 4036255996), (10, 2018127998), (20, 1009063999), (71, 284243380), (142, 142121690), (284, 71060845), (355, 56848676), (461, 43777180), (710, 28424338), (922, 21888590), (1420, 14212169), (1844, 10944295), (2305, 8755436), (4610, 4377718), (9220, 2188859), (30829, 654620), (32731, 616580), (61658, 327310), (65462, 308290), (123316, 163655), (130924, 154145)]