20978388

素因数分解:

$2^2\times 3^2\times {\mathrm{41}}^1\times {\mathrm{61}}^1\times {\mathrm{233}}^1$

素因数の和:345

約数の個数: 72

約数和(自身を含む): 55449576

約数和(自身を除く): 34471188

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 36, 41, 61, 82, 122, 123, 164, 183, 233, 244, 246, 366, 369, 466, 492, 549, 699, 732, 738, 932, 1098, 1398, 1476, 2097, 2196, 2501, 2796, 4194, 5002, 7503, 8388, 9553, 10004, 14213, 15006, 19106, 22509, 28426, 28659, 30012, 38212, 42639, 45018, 56852, 57318, 85278, 85977, 90036, 114636, 127917, 170556, 171954, 255834, 343908, 511668, 582733, 1165466, 1748199, 2330932, 3496398, 5244597, 6992796, 10489194, 20978388]

約数ペア:

[(1, 20978388), (2, 10489194), (3, 6992796), (4, 5244597), (6, 3496398), (9, 2330932), (12, 1748199), (18, 1165466), (36, 582733), (41, 511668), (61, 343908), (82, 255834), (122, 171954), (123, 170556), (164, 127917), (183, 114636), (233, 90036), (244, 85977), (246, 85278), (366, 57318), (369, 56852), (466, 45018), (492, 42639), (549, 38212), (699, 30012), (732, 28659), (738, 28426), (932, 22509), (1098, 19106), (1398, 15006), (1476, 14213), (2097, 10004), (2196, 9553), (2501, 8388), (2796, 7503), (4194, 5002)]