21457580

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{53}}^1\times {\mathrm{653}}^1$

素因数の和:746

約数の個数: 48

約数和(自身を含む): 47464704

約数和(自身を除く): 26007124

約数列:

[1, 2, 4, 5, 10, 20, 31, 53, 62, 106, 124, 155, 212, 265, 310, 530, 620, 653, 1060, 1306, 1643, 2612, 3265, 3286, 6530, 6572, 8215, 13060, 16430, 20243, 32860, 34609, 40486, 69218, 80972, 101215, 138436, 173045, 202430, 346090, 404860, 692180, 1072879, 2145758, 4291516, 5364395, 10728790, 21457580]

約数ペア:

[(1, 21457580), (2, 10728790), (4, 5364395), (5, 4291516), (10, 2145758), (20, 1072879), (31, 692180), (53, 404860), (62, 346090), (106, 202430), (124, 173045), (155, 138436), (212, 101215), (265, 80972), (310, 69218), (530, 40486), (620, 34609), (653, 32860), (1060, 20243), (1306, 16430), (1643, 13060), (2612, 8215), (3265, 6572), (3286, 6530)]