21821272

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{421}}^1$

素因数の和:488

約数の個数: 64

約数和(自身を含む): 48614400

約数和(自身を除く): 26793128

約数列:

[1, 2, 4, 8, 11, 19, 22, 31, 38, 44, 62, 76, 88, 124, 152, 209, 248, 341, 418, 421, 589, 682, 836, 842, 1178, 1364, 1672, 1684, 2356, 2728, 3368, 4631, 4712, 6479, 7999, 9262, 12958, 13051, 15998, 18524, 25916, 26102, 31996, 37048, 51832, 52204, 63992, 87989, 104408, 143561, 175978, 247969, 287122, 351956, 495938, 574244, 703912, 991876, 1148488, 1983752, 2727659, 5455318, 10910636, 21821272]

約数ペア:

[(1, 21821272), (2, 10910636), (4, 5455318), (8, 2727659), (11, 1983752), (19, 1148488), (22, 991876), (31, 703912), (38, 574244), (44, 495938), (62, 351956), (76, 287122), (88, 247969), (124, 175978), (152, 143561), (209, 104408), (248, 87989), (341, 63992), (418, 52204), (421, 51832), (589, 37048), (682, 31996), (836, 26102), (842, 25916), (1178, 18524), (1364, 15998), (1672, 13051), (1684, 12958), (2356, 9262), (2728, 7999), (3368, 6479), (4631, 4712)]