20005289980

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{557}}^1\times {\mathrm{138139}}^1$

素因数の和:138718

約数の個数: 48

約数和(自身を含む): 45324286560

約数和(自身を除く): 25318996580

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 557, 1114, 2228, 2785, 5570, 7241, 11140, 14482, 28964, 36205, 72410, 138139, 144820, 276278, 552556, 690695, 1381390, 1795807, 2762780, 3591614, 7183228, 8979035, 17958070, 35916140, 76943423, 153886846, 307773692, 384717115, 769434230, 1000264499, 1538868460, 2000528998, 4001057996, 5001322495, 10002644990, 20005289980]

約数ペア:

[(1, 20005289980), (2, 10002644990), (4, 5001322495), (5, 4001057996), (10, 2000528998), (13, 1538868460), (20, 1000264499), (26, 769434230), (52, 384717115), (65, 307773692), (130, 153886846), (260, 76943423), (557, 35916140), (1114, 17958070), (2228, 8979035), (2785, 7183228), (5570, 3591614), (7241, 2762780), (11140, 1795807), (14482, 1381390), (28964, 690695), (36205, 552556), (72410, 276278), (138139, 144820)]