19968830

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{79}}^1\times {\mathrm{157}}^1$

素因数の和:273

約数の個数: 64

約数和(自身を含む): 43683840

約数和(自身を除く): 23715010

約数列:

[1, 2, 5, 7, 10, 14, 23, 35, 46, 70, 79, 115, 157, 158, 161, 230, 314, 322, 395, 553, 785, 790, 805, 1099, 1106, 1570, 1610, 1817, 2198, 2765, 3611, 3634, 5495, 5530, 7222, 9085, 10990, 12403, 12719, 18055, 18170, 24806, 25277, 25438, 36110, 50554, 62015, 63595, 86821, 124030, 126385, 127190, 173642, 252770, 285269, 434105, 570538, 868210, 1426345, 1996883, 2852690, 3993766, 9984415, 19968830]

約数ペア:

[(1, 19968830), (2, 9984415), (5, 3993766), (7, 2852690), (10, 1996883), (14, 1426345), (23, 868210), (35, 570538), (46, 434105), (70, 285269), (79, 252770), (115, 173642), (157, 127190), (158, 126385), (161, 124030), (230, 86821), (314, 63595), (322, 62015), (395, 50554), (553, 36110), (785, 25438), (790, 25277), (805, 24806), (1099, 18170), (1106, 18055), (1570, 12719), (1610, 12403), (1817, 10990), (2198, 9085), (2765, 7222), (3611, 5530), (3634, 5495)]