20731970

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{79}}^1\times {\mathrm{163}}^1$

素因数の和:279

約数の個数: 64

約数和(自身を含む): 45342720

約数和(自身を除く): 24610750

約数列:

[1, 2, 5, 7, 10, 14, 23, 35, 46, 70, 79, 115, 158, 161, 163, 230, 322, 326, 395, 553, 790, 805, 815, 1106, 1141, 1610, 1630, 1817, 2282, 2765, 3634, 3749, 5530, 5705, 7498, 9085, 11410, 12719, 12877, 18170, 18745, 25438, 25754, 26243, 37490, 52486, 63595, 64385, 90139, 127190, 128770, 131215, 180278, 262430, 296171, 450695, 592342, 901390, 1480855, 2073197, 2961710, 4146394, 10365985, 20731970]

約数ペア:

[(1, 20731970), (2, 10365985), (5, 4146394), (7, 2961710), (10, 2073197), (14, 1480855), (23, 901390), (35, 592342), (46, 450695), (70, 296171), (79, 262430), (115, 180278), (158, 131215), (161, 128770), (163, 127190), (230, 90139), (322, 64385), (326, 63595), (395, 52486), (553, 37490), (790, 26243), (805, 25754), (815, 25438), (1106, 18745), (1141, 18170), (1610, 12877), (1630, 12719), (1817, 11410), (2282, 9085), (2765, 7498), (3634, 5705), (3749, 5530)]