21287760

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{6823}}^1$

素因数の和:6852

約数の個数: 80

約数和(自身を含む): 71078784

約数和(自身を除く): 49791024

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 16, 20, 24, 26, 30, 39, 40, 48, 52, 60, 65, 78, 80, 104, 120, 130, 156, 195, 208, 240, 260, 312, 390, 520, 624, 780, 1040, 1560, 3120, 6823, 13646, 20469, 27292, 34115, 40938, 54584, 68230, 81876, 88699, 102345, 109168, 136460, 163752, 177398, 204690, 266097, 272920, 327504, 354796, 409380, 443495, 532194, 545840, 709592, 818760, 886990, 1064388, 1330485, 1419184, 1637520, 1773980, 2128776, 2660970, 3547960, 4257552, 5321940, 7095920, 10643880, 21287760]

約数ペア:

[(1, 21287760), (2, 10643880), (3, 7095920), (4, 5321940), (5, 4257552), (6, 3547960), (8, 2660970), (10, 2128776), (12, 1773980), (13, 1637520), (15, 1419184), (16, 1330485), (20, 1064388), (24, 886990), (26, 818760), (30, 709592), (39, 545840), (40, 532194), (48, 443495), (52, 409380), (60, 354796), (65, 327504), (78, 272920), (80, 266097), (104, 204690), (120, 177398), (130, 163752), (156, 136460), (195, 109168), (208, 102345), (240, 88699), (260, 81876), (312, 68230), (390, 54584), (520, 40938), (624, 34115), (780, 27292), (1040, 20469), (1560, 13646), (3120, 6823)]