21427980

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{163}}^1\times {\mathrm{313}}^1$

素因数の和:495

約数の個数: 96

約数和(自身を含む): 69210624

約数和(自身を除く): 47782644

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, 163, 210, 313, 326, 420, 489, 626, 652, 815, 939, 978, 1141, 1252, 1565, 1630, 1878, 1956, 2191, 2282, 2445, 3130, 3260, 3423, 3756, 4382, 4564, 4695, 4890, 5705, 6260, 6573, 6846, 8764, 9390, 9780, 10955, 11410, 13146, 13692, 17115, 18780, 21910, 22820, 26292, 32865, 34230, 43820, 51019, 65730, 68460, 102038, 131460, 153057, 204076, 255095, 306114, 357133, 510190, 612228, 714266, 765285, 1020380, 1071399, 1428532, 1530570, 1785665, 2142798, 3061140, 3571330, 4285596, 5356995, 7142660, 10713990, 21427980]

約数ペア:

[(1, 21427980), (2, 10713990), (3, 7142660), (4, 5356995), (5, 4285596), (6, 3571330), (7, 3061140), (10, 2142798), (12, 1785665), (14, 1530570), (15, 1428532), (20, 1071399), (21, 1020380), (28, 765285), (30, 714266), (35, 612228), (42, 510190), (60, 357133), (70, 306114), (84, 255095), (105, 204076), (140, 153057), (163, 131460), (210, 102038), (313, 68460), (326, 65730), (420, 51019), (489, 43820), (626, 34230), (652, 32865), (815, 26292), (939, 22820), (978, 21910), (1141, 18780), (1252, 17115), (1565, 13692), (1630, 13146), (1878, 11410), (1956, 10955), (2191, 9780), (2282, 9390), (2445, 8764), (3130, 6846), (3260, 6573), (3423, 6260), (3756, 5705), (4382, 4890), (4564, 4695)]