21328372

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{101}}^1\times {\mathrm{131}}^1$

素因数の和:280

約数の個数: 48

約数和(自身を含む): 42223104

約数和(自身を除く): 20894732

約数列:

[1, 2, 4, 13, 26, 31, 52, 62, 101, 124, 131, 202, 262, 403, 404, 524, 806, 1313, 1612, 1703, 2626, 3131, 3406, 4061, 5252, 6262, 6812, 8122, 12524, 13231, 16244, 26462, 40703, 52793, 52924, 81406, 105586, 162812, 172003, 211172, 344006, 410161, 688012, 820322, 1640644, 5332093, 10664186, 21328372]

約数ペア:

[(1, 21328372), (2, 10664186), (4, 5332093), (13, 1640644), (26, 820322), (31, 688012), (52, 410161), (62, 344006), (101, 211172), (124, 172003), (131, 162812), (202, 105586), (262, 81406), (403, 52924), (404, 52793), (524, 40703), (806, 26462), (1313, 16244), (1612, 13231), (1703, 12524), (2626, 8122), (3131, 6812), (3406, 6262), (4061, 5252)]