20379970

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{223}}^1$

素因数の和:299

約数の個数: 64

約数和(自身を含む): 42900480

約数和(自身を除く): 22520510

約数列:

[1, 2, 5, 10, 13, 19, 26, 37, 38, 65, 74, 95, 130, 185, 190, 223, 247, 370, 446, 481, 494, 703, 962, 1115, 1235, 1406, 2230, 2405, 2470, 2899, 3515, 4237, 4810, 5798, 7030, 8251, 8474, 9139, 14495, 16502, 18278, 21185, 28990, 41255, 42370, 45695, 55081, 82510, 91390, 107263, 110162, 156769, 214526, 275405, 313538, 536315, 550810, 783845, 1072630, 1567690, 2037997, 4075994, 10189985, 20379970]

約数ペア:

[(1, 20379970), (2, 10189985), (5, 4075994), (10, 2037997), (13, 1567690), (19, 1072630), (26, 783845), (37, 550810), (38, 536315), (65, 313538), (74, 275405), (95, 214526), (130, 156769), (185, 110162), (190, 107263), (223, 91390), (247, 82510), (370, 55081), (446, 45695), (481, 42370), (494, 41255), (703, 28990), (962, 21185), (1115, 18278), (1235, 16502), (1406, 14495), (2230, 9139), (2405, 8474), (2470, 8251), (2899, 7030), (3515, 5798), (4237, 4810)]