19890780

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{3643}}^1$

素因数の和:3675

約数の個数: 96

約数和(自身を含む): 68565504

約数和(自身を除く): 48674724

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 13, 14, 15, 20, 21, 26, 28, 30, 35, 39, 42, 52, 60, 65, 70, 78, 84, 91, 105, 130, 140, 156, 182, 195, 210, 260, 273, 364, 390, 420, 455, 546, 780, 910, 1092, 1365, 1820, 2730, 3643, 5460, 7286, 10929, 14572, 18215, 21858, 25501, 36430, 43716, 47359, 51002, 54645, 72860, 76503, 94718, 102004, 109290, 127505, 142077, 153006, 189436, 218580, 236795, 255010, 284154, 306012, 331513, 382515, 473590, 510020, 568308, 663026, 710385, 765030, 947180, 994539, 1326052, 1420770, 1530060, 1657565, 1989078, 2841540, 3315130, 3978156, 4972695, 6630260, 9945390, 19890780]

約数ペア:

[(1, 19890780), (2, 9945390), (3, 6630260), (4, 4972695), (5, 3978156), (6, 3315130), (7, 2841540), (10, 1989078), (12, 1657565), (13, 1530060), (14, 1420770), (15, 1326052), (20, 994539), (21, 947180), (26, 765030), (28, 710385), (30, 663026), (35, 568308), (39, 510020), (42, 473590), (52, 382515), (60, 331513), (65, 306012), (70, 284154), (78, 255010), (84, 236795), (91, 218580), (105, 189436), (130, 153006), (140, 142077), (156, 127505), (182, 109290), (195, 102004), (210, 94718), (260, 76503), (273, 72860), (364, 54645), (390, 51002), (420, 47359), (455, 43716), (546, 36430), (780, 25501), (910, 21858), (1092, 18215), (1365, 14572), (1820, 10929), (2730, 7286), (3643, 5460)]