21951920

素因数分解:

$2^4\times 5^1\times {\mathrm{331}}^1\times {\mathrm{829}}^1$

素因数の和:1173

約数の個数: 40

約数和(自身を含む): 51254160

約数和(自身を除く): 29302240

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 331, 662, 829, 1324, 1655, 1658, 2648, 3310, 3316, 4145, 5296, 6620, 6632, 8290, 13240, 13264, 16580, 26480, 33160, 66320, 274399, 548798, 1097596, 1371995, 2195192, 2743990, 4390384, 5487980, 10975960, 21951920]

約数ペア:

[(1, 21951920), (2, 10975960), (4, 5487980), (5, 4390384), (8, 2743990), (10, 2195192), (16, 1371995), (20, 1097596), (40, 548798), (80, 274399), (331, 66320), (662, 33160), (829, 26480), (1324, 16580), (1655, 13264), (1658, 13240), (2648, 8290), (3310, 6632), (3316, 6620), (4145, 5296)]