20291980

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{1423}}^1$

素因数の和:1486

約数の個数: 48

約数和(自身を含む): 45932544

約数和(自身を除く): 25640564

約数列:

[1, 2, 4, 5, 10, 20, 23, 31, 46, 62, 92, 115, 124, 155, 230, 310, 460, 620, 713, 1423, 1426, 2846, 2852, 3565, 5692, 7115, 7130, 14230, 14260, 28460, 32729, 44113, 65458, 88226, 130916, 163645, 176452, 220565, 327290, 441130, 654580, 882260, 1014599, 2029198, 4058396, 5072995, 10145990, 20291980]

約数ペア:

[(1, 20291980), (2, 10145990), (4, 5072995), (5, 4058396), (10, 2029198), (20, 1014599), (23, 882260), (31, 654580), (46, 441130), (62, 327290), (92, 220565), (115, 176452), (124, 163645), (155, 130916), (230, 88226), (310, 65458), (460, 44113), (620, 32729), (713, 28460), (1423, 14260), (1426, 14230), (2846, 7130), (2852, 7115), (3565, 5692)]