19841990

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{47}}^1\times {\mathrm{163}}^1$

素因数の和:261

約数の個数: 64

約数和(自身を含む): 43075584

約数和(自身を除く): 23233594

約数列:

[1, 2, 5, 7, 10, 14, 35, 37, 47, 70, 74, 94, 163, 185, 235, 259, 326, 329, 370, 470, 518, 658, 815, 1141, 1295, 1630, 1645, 1739, 2282, 2590, 3290, 3478, 5705, 6031, 7661, 8695, 11410, 12062, 12173, 15322, 17390, 24346, 30155, 38305, 42217, 53627, 60310, 60865, 76610, 84434, 107254, 121730, 211085, 268135, 283457, 422170, 536270, 566914, 1417285, 1984199, 2834570, 3968398, 9920995, 19841990]

約数ペア:

[(1, 19841990), (2, 9920995), (5, 3968398), (7, 2834570), (10, 1984199), (14, 1417285), (35, 566914), (37, 536270), (47, 422170), (70, 283457), (74, 268135), (94, 211085), (163, 121730), (185, 107254), (235, 84434), (259, 76610), (326, 60865), (329, 60310), (370, 53627), (470, 42217), (518, 38305), (658, 30155), (815, 24346), (1141, 17390), (1295, 15322), (1630, 12173), (1645, 12062), (1739, 11410), (2282, 8695), (2590, 7661), (3290, 6031), (3478, 5705)]