20721810

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{991}}^1$

素因数の和:1059

約数の個数: 64

約数和(自身を含む): 53996544

約数和(自身を除く): 33274734

約数列:

[1, 2, 3, 5, 6, 10, 15, 17, 30, 34, 41, 51, 82, 85, 102, 123, 170, 205, 246, 255, 410, 510, 615, 697, 991, 1230, 1394, 1982, 2091, 2973, 3485, 4182, 4955, 5946, 6970, 9910, 10455, 14865, 16847, 20910, 29730, 33694, 40631, 50541, 81262, 84235, 101082, 121893, 168470, 203155, 243786, 252705, 406310, 505410, 609465, 690727, 1218930, 1381454, 2072181, 3453635, 4144362, 6907270, 10360905, 20721810]

約数ペア:

[(1, 20721810), (2, 10360905), (3, 6907270), (5, 4144362), (6, 3453635), (10, 2072181), (15, 1381454), (17, 1218930), (30, 690727), (34, 609465), (41, 505410), (51, 406310), (82, 252705), (85, 243786), (102, 203155), (123, 168470), (170, 121893), (205, 101082), (246, 84235), (255, 81262), (410, 50541), (510, 40631), (615, 33694), (697, 29730), (991, 20910), (1230, 16847), (1394, 14865), (1982, 10455), (2091, 9910), (2973, 6970), (3485, 5946), (4182, 4955)]