19899828

素因数分解:

$2^2\times 3^2\times {\mathrm{13}}^1\times {\mathrm{101}}^1\times {\mathrm{421}}^1$

素因数の和:545

約数の個数: 72

約数和(自身を含む): 54838056

約数和(自身を除く): 34938228

約数列:

[1, 2, 3, 4, 6, 9, 12, 13, 18, 26, 36, 39, 52, 78, 101, 117, 156, 202, 234, 303, 404, 421, 468, 606, 842, 909, 1212, 1263, 1313, 1684, 1818, 2526, 2626, 3636, 3789, 3939, 5052, 5252, 5473, 7578, 7878, 10946, 11817, 15156, 15756, 16419, 21892, 23634, 32838, 42521, 47268, 49257, 65676, 85042, 98514, 127563, 170084, 197028, 255126, 382689, 510252, 552773, 765378, 1105546, 1530756, 1658319, 2211092, 3316638, 4974957, 6633276, 9949914, 19899828]

約数ペア:

[(1, 19899828), (2, 9949914), (3, 6633276), (4, 4974957), (6, 3316638), (9, 2211092), (12, 1658319), (13, 1530756), (18, 1105546), (26, 765378), (36, 552773), (39, 510252), (52, 382689), (78, 255126), (101, 197028), (117, 170084), (156, 127563), (202, 98514), (234, 85042), (303, 65676), (404, 49257), (421, 47268), (468, 42521), (606, 32838), (842, 23634), (909, 21892), (1212, 16419), (1263, 15756), (1313, 15156), (1684, 11817), (1818, 10946), (2526, 7878), (2626, 7578), (3636, 5473), (3789, 5252), (3939, 5052)]