21930020

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{31}}^2\times {\mathrm{163}}^1$

素因数の和:241

約数の個数: 72

約数和(自身を含む): 54718272

約数和(自身を除く): 32788252

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 31, 35, 62, 70, 124, 140, 155, 163, 217, 310, 326, 434, 620, 652, 815, 868, 961, 1085, 1141, 1630, 1922, 2170, 2282, 3260, 3844, 4340, 4564, 4805, 5053, 5705, 6727, 9610, 10106, 11410, 13454, 19220, 20212, 22820, 25265, 26908, 33635, 35371, 50530, 67270, 70742, 101060, 134540, 141484, 156643, 176855, 313286, 353710, 626572, 707420, 783215, 1096501, 1566430, 2193002, 3132860, 4386004, 5482505, 10965010, 21930020]

約数ペア:

[(1, 21930020), (2, 10965010), (4, 5482505), (5, 4386004), (7, 3132860), (10, 2193002), (14, 1566430), (20, 1096501), (28, 783215), (31, 707420), (35, 626572), (62, 353710), (70, 313286), (124, 176855), (140, 156643), (155, 141484), (163, 134540), (217, 101060), (310, 70742), (326, 67270), (434, 50530), (620, 35371), (652, 33635), (815, 26908), (868, 25265), (961, 22820), (1085, 20212), (1141, 19220), (1630, 13454), (1922, 11410), (2170, 10106), (2282, 9610), (3260, 6727), (3844, 5705), (4340, 5053), (4564, 4805)]