81987760

素因数分解:

$2^4\times 5^1\times {\mathrm{73}}^1\times {\mathrm{101}}^1\times {\mathrm{139}}^1$

素因数の和:326

約数の個数: 80

約数和(自身を含む): 196549920

約数和(自身を除く): 114562160

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 73, 80, 101, 139, 146, 202, 278, 292, 365, 404, 505, 556, 584, 695, 730, 808, 1010, 1112, 1168, 1390, 1460, 1616, 2020, 2224, 2780, 2920, 4040, 5560, 5840, 7373, 8080, 10147, 11120, 14039, 14746, 20294, 28078, 29492, 36865, 40588, 50735, 56156, 58984, 70195, 73730, 81176, 101470, 112312, 117968, 140390, 147460, 162352, 202940, 224624, 280780, 294920, 405880, 561560, 589840, 811760, 1024847, 1123120, 2049694, 4099388, 5124235, 8198776, 10248470, 16397552, 20496940, 40993880, 81987760]

約数ペア:

[(1, 81987760), (2, 40993880), (4, 20496940), (5, 16397552), (8, 10248470), (10, 8198776), (16, 5124235), (20, 4099388), (40, 2049694), (73, 1123120), (80, 1024847), (101, 811760), (139, 589840), (146, 561560), (202, 405880), (278, 294920), (292, 280780), (365, 224624), (404, 202940), (505, 162352), (556, 147460), (584, 140390), (695, 117968), (730, 112312), (808, 101470), (1010, 81176), (1112, 73730), (1168, 70195), (1390, 58984), (1460, 56156), (1616, 50735), (2020, 40588), (2224, 36865), (2780, 29492), (2920, 28078), (4040, 20294), (5560, 14746), (5840, 14039), (7373, 11120), (8080, 10147)]