19977678

素因数分解:

$2^1\times 3^4\times 7^1\times {\mathrm{79}}^1\times {\mathrm{223}}^1$

素因数の和:323

約数の個数: 80

約数和(自身を含む): 52039680

約数和(自身を除く): 32062002

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 27, 42, 54, 63, 79, 81, 126, 158, 162, 189, 223, 237, 378, 446, 474, 553, 567, 669, 711, 1106, 1134, 1338, 1422, 1561, 1659, 2007, 2133, 3122, 3318, 4014, 4266, 4683, 4977, 6021, 6399, 9366, 9954, 12042, 12798, 14049, 14931, 17617, 18063, 28098, 29862, 35234, 36126, 42147, 44793, 52851, 84294, 89586, 105702, 123319, 126441, 158553, 246638, 252882, 317106, 369957, 475659, 739914, 951318, 1109871, 1426977, 2219742, 2853954, 3329613, 6659226, 9988839, 19977678]

約数ペア:

[(1, 19977678), (2, 9988839), (3, 6659226), (6, 3329613), (7, 2853954), (9, 2219742), (14, 1426977), (18, 1109871), (21, 951318), (27, 739914), (42, 475659), (54, 369957), (63, 317106), (79, 252882), (81, 246638), (126, 158553), (158, 126441), (162, 123319), (189, 105702), (223, 89586), (237, 84294), (378, 52851), (446, 44793), (474, 42147), (553, 36126), (567, 35234), (669, 29862), (711, 28098), (1106, 18063), (1134, 17617), (1338, 14931), (1422, 14049), (1561, 12798), (1659, 12042), (2007, 9954), (2133, 9366), (3122, 6399), (3318, 6021), (4014, 4977), (4266, 4683)]