19811220

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{2309}}^1$

素因数の和:2345

約数の個数: 96

約数和(自身を含む): 65197440

約数和(自身を除く): 45386220

約数列:

[1, 2, 3, 4, 5, 6, 10, 11, 12, 13, 15, 20, 22, 26, 30, 33, 39, 44, 52, 55, 60, 65, 66, 78, 110, 130, 132, 143, 156, 165, 195, 220, 260, 286, 330, 390, 429, 572, 660, 715, 780, 858, 1430, 1716, 2145, 2309, 2860, 4290, 4618, 6927, 8580, 9236, 11545, 13854, 23090, 25399, 27708, 30017, 34635, 46180, 50798, 60034, 69270, 76197, 90051, 101596, 120068, 126995, 138540, 150085, 152394, 180102, 253990, 300170, 304788, 330187, 360204, 380985, 450255, 507980, 600340, 660374, 761970, 900510, 990561, 1320748, 1523940, 1650935, 1801020, 1981122, 3301870, 3962244, 4952805, 6603740, 9905610, 19811220]

約数ペア:

[(1, 19811220), (2, 9905610), (3, 6603740), (4, 4952805), (5, 3962244), (6, 3301870), (10, 1981122), (11, 1801020), (12, 1650935), (13, 1523940), (15, 1320748), (20, 990561), (22, 900510), (26, 761970), (30, 660374), (33, 600340), (39, 507980), (44, 450255), (52, 380985), (55, 360204), (60, 330187), (65, 304788), (66, 300170), (78, 253990), (110, 180102), (130, 152394), (132, 150085), (143, 138540), (156, 126995), (165, 120068), (195, 101596), (220, 90051), (260, 76197), (286, 69270), (330, 60034), (390, 50798), (429, 46180), (572, 34635), (660, 30017), (715, 27708), (780, 25399), (858, 23090), (1430, 13854), (1716, 11545), (2145, 9236), (2309, 8580), (2860, 6927), (4290, 4618)]