20178859540

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{3739}}^1\times {\mathrm{5507}}^1$

素因数の和:9269

約数の個数: 72

約数和(自身を含む): 49316208480

約数和(自身を除く): 29137348940

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980, 3739, 5507, 7478, 11014, 14956, 18695, 22028, 26173, 27535, 37390, 38549, 52346, 55070, 74780, 77098, 104692, 110140, 130865, 154196, 183211, 192745, 261730, 269843, 366422, 385490, 523460, 539686, 732844, 770980, 916055, 1079372, 1349215, 1832110, 2698430, 3664220, 5396860, 20590673, 41181346, 82362692, 102953365, 144134711, 205906730, 288269422, 411813460, 576538844, 720673555, 1008942977, 1441347110, 2017885954, 2882694220, 4035771908, 5044714885, 10089429770, 20178859540]

約数ペア:

[(1, 20178859540), (2, 10089429770), (4, 5044714885), (5, 4035771908), (7, 2882694220), (10, 2017885954), (14, 1441347110), (20, 1008942977), (28, 720673555), (35, 576538844), (49, 411813460), (70, 288269422), (98, 205906730), (140, 144134711), (196, 102953365), (245, 82362692), (490, 41181346), (980, 20590673), (3739, 5396860), (5507, 3664220), (7478, 2698430), (11014, 1832110), (14956, 1349215), (18695, 1079372), (22028, 916055), (26173, 770980), (27535, 732844), (37390, 539686), (38549, 523460), (52346, 385490), (55070, 366422), (74780, 269843), (77098, 261730), (104692, 192745), (110140, 183211), (130865, 154196)]