19970912

素因数分解:

$2^5\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{787}}^1$

素因数の和:871

約数の個数: 48

約数和(自身を含む): 43090992

約数和(自身を除く): 23120080

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 61, 104, 122, 208, 244, 416, 488, 787, 793, 976, 1574, 1586, 1952, 3148, 3172, 6296, 6344, 10231, 12592, 12688, 20462, 25184, 25376, 40924, 48007, 81848, 96014, 163696, 192028, 327392, 384056, 624091, 768112, 1248182, 1536224, 2496364, 4992728, 9985456, 19970912]

約数ペア:

[(1, 19970912), (2, 9985456), (4, 4992728), (8, 2496364), (13, 1536224), (16, 1248182), (26, 768112), (32, 624091), (52, 384056), (61, 327392), (104, 192028), (122, 163696), (208, 96014), (244, 81848), (416, 48007), (488, 40924), (787, 25376), (793, 25184), (976, 20462), (1574, 12688), (1586, 12592), (1952, 10231), (3148, 6344), (3172, 6296)]