20639220

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{157}}^1\times {\mathrm{313}}^1$

素因数の和:489

約数の個数: 96

約数和(自身を含む): 66678528

約数和(自身を除く): 46039308

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 157, 210, 313, 314, 420, 471, 626, 628, 785, 939, 942, 1099, 1252, 1565, 1570, 1878, 1884, 2191, 2198, 2355, 3130, 3140, 3297, 3756, 4382, 4396, 4695, 4710, 5495, 6260, 6573, 6594, 8764, 9390, 9420, 10955, 10990, 13146, 13188, 16485, 18780, 21910, 21980, 26292, 32865, 32970, 43820, 49141, 65730, 65940, 98282, 131460, 147423, 196564, 245705, 294846, 343987, 491410, 589692, 687974, 737115, 982820, 1031961, 1375948, 1474230, 1719935, 2063922, 2948460, 3439870, 4127844, 5159805, 6879740, 10319610, 20639220]

約数ペア:

[(1, 20639220), (2, 10319610), (3, 6879740), (4, 5159805), (5, 4127844), (6, 3439870), (7, 2948460), (10, 2063922), (12, 1719935), (14, 1474230), (15, 1375948), (20, 1031961), (21, 982820), (28, 737115), (30, 687974), (35, 589692), (42, 491410), (60, 343987), (70, 294846), (84, 245705), (105, 196564), (140, 147423), (157, 131460), (210, 98282), (313, 65940), (314, 65730), (420, 49141), (471, 43820), (626, 32970), (628, 32865), (785, 26292), (939, 21980), (942, 21910), (1099, 18780), (1252, 16485), (1565, 13188), (1570, 13146), (1878, 10990), (1884, 10955), (2191, 9420), (2198, 9390), (2355, 8764), (3130, 6594), (3140, 6573), (3297, 6260), (3756, 5495), (4382, 4710), (4396, 4695)]